Genetics Questions
Asked by Users

How these terms are all inter-related, genetics, dominant trait, recessive trait, allele, genotype, phenotype, homozygious, heterozygous, codominance and mutation? 
Read Gene .

Show by means of diagrams how it is possible for a human cell to have 44 chromosomes and xxxy sex chromosomes. 
Study Sex Chromosomes .

If a woman is blood type O+ and her spouse is blood type B are they compatible to make a baby? 
Study Blood Types Review .

An individual for 3 genes and heterozygous for 7 genes, how many different genotypes will be present? 
read Genetics .

If after gel electrophoresis dna show identical bands and pattern samples contain what? 
Same amount of DNA, same amount of molecules or fragments of same size. Study Genetics .

What causes an abnormal karyotype in humans? 
What are the most common causes? Read Karyotype and Genetic Diseases .

What is the genotypic ratio of f2 generation between homozygous dominant and heterozygous dominant? 
B=black,b=white. B is dominant over b. Parental generation is BB cross Bb. What is the genotypic ratio of f2 generation? Read Genetics .

What are the three types of epistasis? Explain each with examples. 
Study Epistasis .

Using Mendel's laws, explain why his F2 generation contained more pea plants with dominant traits than with recessive traits. 
Because the dominant traits are more common. Read Mendel's Laws .

In flowers, blue colour is dominant over white petal colour. the genotype of a heterozygous blue flower and the phenotype of a white flower respectively is? 
A)Bb and bb B)BB and bb C)White and Black D)Bb and white Study Mendel's Laws .

What is the law of hybridization? 
Mixing genes? Study Genetics .

What is a simple definition of Mendel's second law? 
Study Mendel's Laws .

In one of mendel's studies, he found that the allele for purple flowers was dominant over the allele for white flowers... 
Show the cross of one plant with pure-purple flowers and a second plant with white-flowers. Read Genetics .

How do the laws of segregation and independent assortment affect inheritance patterns 
Study Mendel's Laws .

How are genetic diseases different to infectious such as measles? 
Read Karyotype and Genetic Diseases .

A level biology assignment: what are the effects on the metabolism of bacterium when insulin is introduced?  
I've answered: describe how genetic information is introduced into micro-organisms using insulin as an example. I'm stuck on what happens to it's metabolism …

Which enzymes are used in DNA manipulations for gene cloning? 
Study Genetic Engineering .

Why does gene linkage limit the variability of an organism? 
closer to chromosomes? Study Genetics .

Traits that are determined by a single gene are? 
Study Genetics .

When doing a genetic cross, why is it necessary to remove the parent flies before the pupae have hatched ? 
When doing a genetic cross, why is it necessary to remove the parent flies before the pupae have hatched? Study Genetics .

Chromosomes contain specific substances within their structure. Which of the following substances is not contained in a chromosome? 
Study Cell Nucleus - Definition, Structure and Function .

Since O type has Anti-A and Anti-B antibodies, how can O be given to AB, A or B ? 
Are only RBCs donated or the whole blood, if whole blood, i think it would create a problem for the receiver . :/ Study Blood Types Review .

Why we represent alleles for blood group as IA, IB and i? 
Read Blood Types Review .

What are post-mendelian theories? 
Study Evolution Theory .

In a PCR followed by electrophoresis, what gets assorted by size? 
I am thinking it's DNA, other choices include rna, cells, antigen, or antibodies. Read Genetic Engineering .

If #1 is heterozygous for her blood type and if #2 is homozygous for his blood type, what possible blood types could their children have? 
Study Blood Types Review .

We can use anti-A, anti-B sera to detect blood types, so, why do we use anti-AB serum for blood typing? 
Study Blood Types Review .

What would happen to the variety of children produced if we made one parent homozygous dominant for all of the traits?  
Read Mendel's Laws .

Where is the genetic material in the cell? In DNA? 
Study Nucleic Acid .

THE LITTER RESULTING FROM THE MATING OF TWO SHORT-TAILED CATS CONTAINS THREE KITTENS WITHOUT TAILS TWO WITH LONG TAILS AND SIX WITH SHORT TAILS... 
WHAT WOULD THE PUNNET SQUARE FOR THIS BE? Study Mendel's Laws .

What were the problems encountered by mendel during his study of genes? 
Time, money?

What are the different levels of severity of Proteus Syndrome and how do those levels of severity of Proteus Syndrome affect the patient? 
I would like to know about the different levels of severity of Proteus Syndrome and how it affects the patient. Why do these levels of severity occur? …

What confounding problems could have occurred if mendel had chosen another plant with exposed male and female structures? 
Study Mendel's Laws .

Is it possible to cross plants with different traits and only focus on one trait but still call it a monohybrid cross? 
Read Mendel's Laws .

If we have got the sequences of two alleles of a single gene, can we distinguish which sequence belongs to the dominant allele and which one is the other? 
I know that there is a difference between dominant and recessive alleles sequence. But, what's your idea if we have the two alleles sequences and we want …

Is there any relationship among anti-Rhesus, gender and death? 
I mean if a guy don't have anti-rhesus, would it be more likely for him to die than a girl without anti-rhesus? Study Blood Types Review .

What is mutation? 
Study Karyotype and Genetic Diseases .

Would a cross between a homozygous and a heterozygous parent show the same ratios? 
Explain. Study Mendel's Laws .

What is the role of blood in determining the blood group? 
Read Blood Types Review .

A cross gives a 3:1 phenotype ratio. What are the genotypes of the parents? 
Study Mendel's Laws .

A man with an x-linked recessive trait has a daughter with a woman who does not exhibit the trait. What is/are the possible genotypes of the daughter?  
Study Sex Chromosomes .

Define diseases cause by ploidy in humans. 
Study Karyotype and Genetic Diseases .

Gene Pairs 
The gene pair is the set of alleles at a locus in the homologous chromosomes. One of the alleles if the gene pair came from the biological mother, the …

What does it mean that someone has a little bit of extra material on the x chromosome? 
You may find answer here: Karyotype and Genetic Diseases

How can there be an XX male phenotype and an XY female phenotype? 
How can there be an XX male phenotype and an XY female phenotype?

In genetic engineering, why scientist decide what kind of changes they want in a specific DNA molecule?  
to avoid diseases

Explain the phenomenon of linkage with an example. 
Phenomenon of linkage

What are the steps followed in human gene cloning technique? 
1.How human nucleus can be transfused in human ? 2. Is there any need of stem cell to develop the clone's body ?

Could scientists come to know before inserting the gene from another species the danger it could perhaps bring later? 
Click on post comments to answer. For studying more than 1800 Bioloqy questions correctly answered, download our ebook .

What is the importance of linkage and crossing over of genes? 
Click on post comments to answer. For studying more than 1800 Bioloqy questions correctly answered download our ebook .

How do scientist use punnett squares to predict inheritance? 
How can punnett squares predict inheritance?

What is double crossing over? 
Crossing over is the exchange of segments of chromosomes, and thus the exchange of DNA, but what exactly is double crossing over and what is its impact …

Explain why an organism with a homozygous dominant genotype has the same phenotype as an organism with a heterozygous genotype? 
I really need some help with this question. Im so confused.

According to Mendel’s law of independent assortment, how many different types of gametes would an AaBb parent have? An AABb parent? 
Click on post comments to answer.

What is the difference between epistasis and dominance? 
In epistasis two allells are located in same locus but they are located in different locus.

How has the study of genetics led to technological advances in the medical field? 
Click on post comments to answer.

The height of a plant is under the control of polygenic inheritance. The genotype of a plant A1A1 A0A0 has 50 cm and the height of plant a1a1 a0a0 is 26 cm. What is the contribution of each gene? 
Click on comments below to answer.

What is oskar? 
Oskar is a gene needed for the development of embryo in drosophila embryo in their early stage.

Is it possible to determine the genotype of a plant with a dominant phenotype for the trait? How? 
?

Discuss the attainment of Hardy-Weinberg equilibrium in a founder population in which the allelic frequencies of an X-linked trait is different in males and females. 
Discuss the attainment of Hardy-Weinberg equilibrium in a founder population in which the allelic frequencies of an X-linked trait is different in males …

Tell how is the blood group identified? 
?

What are holandric genes? 
This is incorrect - it has been disproven. "A widely known holandric gene is the one that conditions hypertrichosis pinnae (hair in the ears), a phenotype …

If genes of all organs are same than why organs are different from each other? 
?

What is the role of multiple alleles in blood groups? 
What is the role of multiple alleles in blood groups?

How does a person with group AB survive from diseases yet they dont have antibodies? 
The AB blood group has a combination of blood group A and B which are codominance.

What is point mutation? Give one example. 
What is point mutation? Give one example.

What is the difference between epistasis and linkage? 
What is the difference between epistasis and linkage?

Why is polymerase chain reaction useful in genetic engineering? 
Please answer!!

Are plasmids in the biotechnology field of agriculture or industry? 
Many of the answers are in our main pages related to this subject.

Substitutions, additions, or deletions of one or more nucleotides in a DNA molecule is called? 
a) a gene mutation b) transcription c)coding d)anemia

What is meant by inbreeding? 
in point or essay?

How can a couple affected by phenylketonuria have a normal child? 
?

Do parents have same blood group as their children? 
For example a woman having blood group A married to a man having blood group A than what would be the blood group of their offspring?

Which trait below would show more if both recessive? 
BB= black bb= brown EE= alows the expression of B/b ee= yellow, and bbee is the trait given.

What is the difference between genes and DNA? 
Genes and dna are parts of chromosomes?

Differentiate between linkage and independent assortment. 
Both the phenomena don't occur simultaneously, i.e. if linkage takes place, independent assortment don't find an expression.

Who is responsilbe, in the cell, for the elevation of the temperature to 94ºC during the PCR? 
During the PCR, in one of its phase, the temperature reaches 94ºC. Who is the responsible, in the cell, for this temperature increase?

If a heterozygous dominant tall pea plant is crossed with a short pea plant, what is the expected phenotypic ratio of tall:short plants? 
1 short, 1 tall.

What are Hox genes and what is their evolutionary importance? 
Hox genes appear to have evolutionary importance, however I cant understand what they are, how they work and consequently I cant understand what is their …

What are the similarities and differences between the segregation of genes and that of chromosomes? 
Don't know yet.

How can you distinguish whether a mutant trait is an inheritable or environmental effect? 
sex linked

Is sickle cell disease an example of pleiotrophy or heterozygous dominance? 
I think it is heterozygous dominance.

What is the percentage of genes that are the same as porifera? 
How many genes do we share with sponges? Give me a percent.

Is it possible for two blue eyed people to have a brown eyed offspring? 
Help settle this debate.

Outline some genetic defects and explain how they can be detected? 
albinism

In a genetic cross between two flowering plants that are heterozygous for the color trait, red flowers (R) are dominant to white flowers (r). What fraction of the offspring should have red flowers? 
In a genetic cross between two flowering plants that are heterozygous for the color trait, red flowers (R) are dominant to white flowers (r). What fraction …

How can we alter the structure of genes? 
Answer?

Why are boys and girls usually born in equal numbers? 
I need the answer asap, please. Thanks.

What is the condition in which an organism has extra sets of chromosomes? 
definition

Is there any difference between linkage and linkage map? 
Linkage occurs when two genes are found in the same chromosome.

If father blood group is MN & mother is of N group the possible blood group of the child is? 
it may be MN

An individual's genotype for an inherited trait is the? 
A.) set of alles carried for the trait B.) sex of the individual in relation to the trait C.) physical appearance of the trait D.) family's …

How can you tell if there's a lethal allele when given a problem? 
In a Belgian horses, coat coloration can either be chesnut brown or roan (brown with white mixed in). The coloration pattern in these horses is governed …

If AABB is cross with aabb and the f1 is test cross, what % of the test cross progeny will be aabb, if the genes are unlinked? 
if AABB is cross with aabb and the f1 is test cross, what % of the test cross progeny will be aabb, if the genes are unlinked?

Genetics interactions 
A dominant gene V in humans causes certain areas of the skin to become depigmented, a condition called "vitiligo." Albinism is the complete lack of pigment …

What does the term "diploid" mean? Also, are humans diploids? 
Click on post comments to answer.

How was Mendel's experiments performed? 
Experiment with peas convinced him? Click on post comments to answer.

How to do a Punnet square? 
Click on post comments to answer.

Can two people with attached earlobes have a baby with unattached earlobes? 
My wife and I have attached earlobes and our daughter's are free. Click on post comments to answer.

In a cross between two homozygous parents, the offspring from the first generation always have _____? 
a)the same genotype b) a different phenotype c) the same genotype and phenotype d) a different genotype and phenotype Click on post comments to …

What kind of mutation is one that has only one base pair change but the others stay the same? 
Click on post comments to answer.

If a husband and wife have the ABO blood group genotypes IaIb and ii, what ABO blood types can their children have ? 
Click on post comments to answer. Note: read our review on blood types.

What is mutation? 
Mutation in heritable changes in choromosomes (genetic material). It is a very useful as well as harmful process because some changes are usable and harmful …

Color blindness is controlled by?  
Click on post comments to answer.

In a cross between two homozygous parents, the offspring from the first generation always have... 
Click on post comments to answer.

Genes produce a phenotype by? 
How does the gene produce a phenotype? Click on post comments to answer.

Crossing over involves the exchange of pieces of DNA between what? 
Click on post comments to answer.

How many DNA molecules do we have in each of our somatic cells?  
There are 46 chromosomes and 2 sets of 23. Click on post comments to answer.

What is the principle of dominance? 
Click on post comments to answer.

What would occur if both X chromosomes were to remain active in a female? 
I understand that if you have extra chromosomes it causes illnesses such as Down Syndrome, but I'm curious if a female with the normal two healthy X chromosomes …

if two gene pair Aa and Bb are assorted independently with A dominant to a and B dominant to b, what are the resulting probabilities? 
I think an AABB zygote from the cross AaBb x AABB. Click on post comments to answer.

How to know if an inherited trait is sex linked or autosomal? 
Click on post comments to answer.

A Genetics question 
In the japanese morning glory (pharbitis nil) true breeding strains from northern and southern Japan with blue flowers were hybridized. The F1 hybrids …

Dominant alles mask the effects of recessive alleles. True or false? 
True or false? Note: Good question. Click on post comments to answer.

What is the advantage of using heat stable DNA polymerase in PCR? 
Have no idea what the answer is. Click on post comments to answer.

What is translocation? 
This question is in terms of Genetics. Click on post comments to answer.

What is meant by Genetics? 
Click on post comments to answer.

What are pleiotropic genes?  
Click on post comments to answer.

What is the difference between a monohybrid cross and a dihybrid cross? 
Click on post comments to answer.

The number of chromosomes is determined by counting what structure ? 
Click on post comments to answer.

10 genetic questions. 
Please answer the following 10 questions below about human genetics. Achondroplasia (dwarfism) is an autosomal dominant disorder.A dwarf mother and …

What is offspring that results from crosses between true-breeding parents with different traits called? 
Click on post comments to answers.

When a red snapdragon and a white snapdragon produce a pink snapdragon, what has occurred? 
Click on post comments to answer.

Wtha is offspring that results from crosses between parents with different traits called? 
Hybrids. Click on post comments to answer.

What type of allele dominance occurs when both alleles are active and expressed? 
Complete dominance. Click on post comments to answer.

What are traits that are produced by gene interactions? 
Multiple alleles? Click on post comments to answer.

300 kernels resulted from the mating of several corn plants that were all heterozygous for kernel color production (Pp x Pp). How many of these kernels would probably have purple color?  
Assume normal Mendelian ratios: purple is dominant over yellow-remember this is a monohybrid cross. a.65 b. 75 c.150 d.225 Click on post comment …

Gregor Mendel used pea plants to study what? 
Flowering?

What fraction of normal drosophila offspring does not inherit a maternal x chromosome? 
What fraction of normal drosophila offspring does not inherit a maternal x chromosome?

Why is amniotic fluid collected during prenatal testing for abnormal chromosomes? 
To obtain fetal cells?

Is it possible father and mother RH positive but the mother is hybrid? 
Father and mother RH positive but the mother is hybrid?

Is the inheritance of the colour of flowers of Mirabilis jalapa an example for incomplete dominance or codominance? 
In Mirabilis jalapa three colours of flowers are found as red ,pink and white.Is the pink colour flower a different form or an inter mediate form?

How different mutations can be seen in a karyotype? 
I have no idea,

in which way Mendel was very fortunate? 
Fortunately for him all the seven pairs of contrasting characters were located on separate chromosomes!!

Is a baby guaranteed from genetic disorder if the chromosome configuration appears normal after karyotyping? 
Please, explain.

What is a gene? Explain. 
A gene is a segment of DNA that directs the production of RNA and protein.

Who coined the term Genetics? 
Carl Correns.

What is the phenotype if the genotype is DD ? 
What is the phenotype if the genotype is DD?

What is inheritance of genes (traits) in the sex chromosomes? 
Heredity?

What parent determine the child's frame size? 
I have two children and one has a small frame thin and wiry and the other has a large frame very stocky. Why are they different and what parent genetics …

What are the effects of a serine protease on drosophila development? 
I know it has something to do with ventral and dorsal axis but that's all I can remember.

Why can't a living being have 100% DNA configuration similar to other living being (although 99.9% is similar why not 100%)? 
Of course because of crossing over and meiosis but defects in this process can bring about similarities mentioned above...right?

Why do identical twins have different different finger prints even though they share the almost same genome? 
The twins in wombs move or float and thus every movement accompanies change in the patterns of the skin touching the inner membrane of the placenta, thus …

If the separation of the zygote occurs very early after fertilisation, then twins each have what? 
Don't get what to write, help me...

What are the first commercially available recombinant proteins? 
Antibodies?

How many different gametes can an RRYy parent form? What are they? 
Punnett square of dihybrid cross.

How does the inheritance of diseases occur? 
Please comment fast, I need this answer urgently...