Question

Imagine that the head shape is controlled by a maternal effect gene. The dominant h+ allele...

Imagine that the head shape is controlled by a maternal effect gene. The dominant h+ allele produces an oval-shaped head, while the recessive h allele produces a square head. Imagine that a woman has a square head. Her father has the h+ h+ genotype. What proportion of head phenotypes do you expect to see in her children?

Please provide explanation.

Science   Biology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Answer :-

Given :- head shape is controlled by a maternal effect gene.

I.e allele inherited from mother will decide the phenotype of resultent offspring irrespective of allele form father .

Let h+ - dominant allele - results in ovale head.

And h = recessive allele - resulted in square head

Solution :

A woman has a square head and has a father with genotype h+h+ .This suggest that she must be heterozygous for genotype and inherited allele h from her mother that resulted her square shaped head.

She is heterozygous for genotype i.e her genotype is h+h

That is probability of passing each allele to her offspring is 50%

Therefore ; proportion of offspring with ovale head will be 50%

And proportion of offspring with square head will be 50%.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In humans, albinism is controlled by a single recessive allele ( c ), and normal skin...
In humans, albinism is controlled by a single recessive allele ( c ), and normal skin pigmentation is controlled by the dominant allele ( C ). A) If a homozygous normal male marries a woman with albinism, what are their chances they will have a baby with albinism? Show the Punnett Square for your answer. B) If a heterozygous normal female marries a man with albinism, what are their chances they will have a baby with albinism? Show the Punnett...
In humans, the ABO blood type is controlled by a single gene with three possible alleles....
In humans, the ABO blood type is controlled by a single gene with three possible alleles. Allele IA codes for blood type A and is co-dominant to allele IB which codes for blood type B. Allele i is recessive to the other two and codes for blood type O. A man of blood group O marries a woman of blood group A.  The wife's father is blood group O.  What is the probability that their children will have blood group O?
1) One parent has yellow flowers, which is the dominant allele Y. The second parent has...
1) One parent has yellow flowers, which is the dominant allele Y. The second parent has white flowers, the recessive allele y. If the offspring are all yellow, what is the genotype of each parent? 2) A plant is homozygous for the recessive gene "a" causing the plant to be short. What is the genotype and the phenotype of this plant? (In your answer, be very clear about which is the genotype and which is the phenotype). 3) The allele...
2. In humans, pigmented skin (H) is dominant over albino skin (h). An albino woman marries...
2. In humans, pigmented skin (H) is dominant over albino skin (h). An albino woman marries a pure-line man with pigmented skin and they have twelve children. a) Write the genotypes of the parents: Man_________ Woman_______ b) Write the genotypes of the children: ________   c) If these children marry genotypes like themselves and from these unions 80 grandchildren are produced. 1) What are the possible gametes produced by the F1 generation parents (from b above): Remember to circle them.     2)...
8. Imagine that coat color in dogs is determined by two genes, each of which has...
8. Imagine that coat color in dogs is determined by two genes, each of which has two alleles: The dominant P allele of the pigment gene allows the dog to produce black pigment, while the recessive p allele is a null allele that does not produce any pigment. The dominant T allele of the transporter gene makes a transporter protein that transports the pigment into the hair cells, while the recessive t allele is a null allele that does not...
A maternal effect gene exists in a dominant N (normal)allele and a recessive n (mutant) allele....
A maternal effect gene exists in a dominant N (normal)allele and a recessive n (mutant) allele. How would the results differ in the reciprocal sets of crosses? nn female x NN male --> F1 --> F2 NN female x nn male --> F1 --> F2 A.) In the first set of crosses, all the F1s would be mutant and all the F2s would be mutant, but in the second set of crosses all the F1s would be normal and all...
A widow’s peak is an autosomal dominant trait while a straight hairline is a recessive trait....
A widow’s peak is an autosomal dominant trait while a straight hairline is a recessive trait. Mike and his dad have a widow’s peak. Mike marries Bethany who has a continuous hairline like Mike’s mom. What is the probability that Mike and Bethany’s first child will have a widow’s peak? Complete Punnett Square to support your answer. Leave Blank Probability of first child: A 15-year old boy was diagnosed with a usual autosomal inherited form of diabetes. His mother was...
4. If you can taste the chemical PTC, it means you have at least one copy...
4. If you can taste the chemical PTC, it means you have at least one copy of a dominant gene for (that will be C). If you can't taste it, you have two copies of the recessive allele for tasting PTC- (that will be c) therefore making a non-taster's genotype cc). A man who can taste PTC marries a woman who can also taste PTC. Both partners each have one parent who cannot taste PTC and one who can. If...
Simple Dominance with 2 genes A gene in cats causes them to be black (dominant) or...
Simple Dominance with 2 genes A gene in cats causes them to be black (dominant) or brown (recessive). A second gene causes cats to be agouti (have stripes on their hairs) or non-agouti (solid colored hairs). If you did a dihybrid cross between two black haired agouti cats, what fraction of the offspring would be expected to have each phenotype? If a dihybrid black agouti cat mated with a brown cat that was heterozygous for the agouti gene, what fraction...
1. In humans, red/green color blindness is sex-linked.  The gene for normal vision (N) is dominant to...
1. In humans, red/green color blindness is sex-linked.  The gene for normal vision (N) is dominant to its recessive allele for color blindness (n). A normal vision woman marries a man with red/green color blindness. Both of their fathers are color blind. What % of their sons would have normal vision? A. 50% B. 75% C. 100% D. 0% 2. The alleles for ABO blood types are designated by IA, IB & i  (also written Io). A woman with type B blood...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT