Genetics 1. A man with blood type B is the father of a child with blood...
Genetics
1. A man with blood type B is the father of a child with blood type A, and the mom is blood type AB. What is the father's genotype?
- a. not enough information to determine the father's genotype
- b. AB
- c. Bo
2. What are the chances that a couple will have a boy with colorblindness, sex-linked recessive if the father is colorblind and the mother is homozygous dominant for normal color vision?
- a. 0%
- b. 100%
- c. 75%
- d. 50%
3. Which of the following are possible gametes produced by a parent who is heterozygous for taster and homozygous dominant for widows peak. select all that are correct.
- a. Tw
- b. tW
- c. tw
- d. Ww
Homework Answers
Answer 1(
The father phenotype is B. And it is given that the child have A blood group. The blood group of woman is AB.
That's why the iB allele carrying gamete from mother and iO from father will lead to formation of iBiO genotype child. The phenotype of child is B blood group.
Genotype is Bo (c).
---
Answer 2)
Parents : XcY ( colorblind father) × XCXC ( normal homozygous female)
Punnet square:
| Gametes | XC | XC |
| Xc | XCXc ( normal daughter) | XCXc ( normal daughter) |
| Y | XCY ( normal son) | XCY ( normal son) |
Henece there are 0% chances of colorblind boy from this parent.
a) 0% is the right answer.
----
Answer 3)
the parent is homozygous for widow peak and heterozygous for taster.
The parent genotype is Tt WW.
the gametes formed by this parent are:
* TW
*tW
That's why B ( tW) is the right option.
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