Question

11. Tim and Christine have freckles (a dominant trait that is not sex linked), but their...

11. Tim and Christine have freckles (a dominant trait that is not sex linked), but their son Michael does not. Use a Punnett square to show how this situation is possible. What is the probability that their next child will have freckles?

Science   Biology   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Freckles is an autosomal dominant trait. Let F be the allele causing freckles. Tim and Christine have Freckles and they may be either FF or Ff. But since their child doesnt have freckles. So the parents should be heterozygous (Ff).

The cross between Tim and Christine is shown below:

  

As we can see, one of the possibilities between this cross is ff which will not have freckles. Hence Michael is ff.

A child can have freckles if he is FF or Ff. Hence the probability for their next child to have freckles is 3/4 ( 1FF+2Ff)

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
Critical Thinking: Trait F is the Mendelian trait for freckles, where F is dominant over f....
Critical Thinking: Trait F is the Mendelian trait for freckles, where F is dominant over f. • Timmy is homozygous dominant for trait F. • Timmy mates with Sally who is heterozygous for trait F. • Timmy's father and Timmy's mother are both heterozygous for trait F. • Timmy's maternal grandmother (mother's mother) is homozygous recessive for trait F. • Timmy's maternal grandfather (mother's father) is homozygous dominant for trait F. Use the information provided to complete the three separate...
Having freckles is a dominant trait. A person is heterozygous for having freckles. Their genotype is...
Having freckles is a dominant trait. A person is heterozygous for having freckles. Their genotype is _________ and their phenotype is _________. [ Choose the choice with the answers in the correct order. ] * Freckles, Ff ff, freckles freckles, no freckles Ff, Freckles A fertilized egg created through sexual reproduction ______________. * is genetically identical to the parents contains genetic material from only one parent is genetically identical to other eggs of the same parents has a combination of...
In drosophila (fruit flies), eye colour is sex-linked and red eye colour is dominant to white...
In drosophila (fruit flies), eye colour is sex-linked and red eye colour is dominant to white eye colour. In a cross between a red-eyed male and a heterozygous female, what is the probability of producing white eyed female? ___________ [2 Marks] 8. Black fur in grasscutter (B) is dominant to brown fur (b.) Short tails (T) are dominant to long tails (t). What fraction of the progeny of the cross BbTt x BBtt will have black fur and long tails?...
Nose size in humans is an incomplete dominant trait. A small nose is the truly recessive...
Nose size in humans is an incomplete dominant trait. A small nose is the truly recessive trait. What genotype do you need to have for a nose to be considered small? _____ If Dad has a large nose, meaning homozygous dominant, and mom is heterozygous, what is the probability of the offspring having a small nose? ______________ % Complete the Punnett square below to confirm your answer above. Place each letter of Mom’s alleles over the top two boxes, and...
Uniden’s condition is an X-linked recessive trait in the Redialer population. The trait allele F has...
Uniden’s condition is an X-linked recessive trait in the Redialer population. The trait allele F has a frequency of 0.005 in this population; that is. the frequency is the same in the male and female populations. Individuals with this trait have a strong desire to use land-line phones. Note, the trait gene is in Hardy Weinberg Equilibrium (HWE) for the female Redialer population. An man with the trait and an woman without the trait have a son. What is the...
In diploid flying unicorns, having a long horn (H) is a trait that is dominant over...
In diploid flying unicorns, having a long horn (H) is a trait that is dominant over short horn (h), and white fur (F) is a dominant trait over pink fur (f). A short horned pink female unicorn mates with a long-horned white male whose parents are a long-horned white father, and a short-horned pink mother. What is the male's genotype? -------------------- In diploid flying unicorns, having a long horn (H) is a trait that is dominant over short horn (h),...
1. Is anyone dominant for every trait? Is anyone recessive for every trait? If not, what...
1. Is anyone dominant for every trait? Is anyone recessive for every trait? If not, what does this show about dominance and recessiveness of traits in people? 2. If a man is homozygous for Hitchhiker’s thumb and marries a woman with homozygous dominant alleles, what is the probability of them having children with Hitchhiker’s thumb? 3. Two people that look alike have thousands of common traits. How often do you think that genetic twins (aside from identical twins) exist? Explain...
In human beings, the gene for red‑green colorblindness (r) is sex‑linked and recessive to its allele...
In human beings, the gene for red‑green colorblindness (r) is sex‑linked and recessive to its allele for normal vision (R), while the gene for freckles (F) is autosomal and dominant over its allele for nonfreckled (f). A nonfreckled, normal‑visioned woman whose father was freckled and colorblind, marries a freckled, colorblind man whose mother was nonfreckled.             a. What is the genotype of the woman's father?             b. What is the probability that the couple's first child will be a non-freckled,...
A man with hemophilia (a recessive, sex-linked condition) and a woman that carries the hemophilia allele...
A man with hemophilia (a recessive, sex-linked condition) and a woman that carries the hemophilia allele have a daughter with normal phenotype. Define allele symbols for the hemophilia and normal alleles. Draw a pedigree and indicate the genotype of each individual in the pedigree. The daughter marries a man who is normal for the trait. What is the probability that a daughter of this pair will be a hemophiliac? What is the probability that a son will be a hemophiliac?...
1) A woman with blood type A marries a man with blood type B. Their three...
1) A woman with blood type A marries a man with blood type B. Their three children have blood types A, AB, and B. Which trait, if any, is dominant? Explain. What are the genotypes of the parents? What is the probability of these parents having a child with blood type O? Show your Punnett square.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT