Asked by Mimmi

1. White skin (W) is dominant over yellow skin (w) in chickens. Which of the following genotypes would result in a white-skinned chicken that could possibly have yellow-skinned offspring?

A. WW
B. Ww**
C. ww

2. Which of the following describes the genotype and phenotype of parents whose child will definitely have a recessive trait?

A. Both parents have a homozygous for the recessive allele and have that trait**
B. Both parents have a homozygous for the recessive allele but do not have that trait
C. Both parents have a heterozygous for the recessive allele and have that trait
D. Both parents have a heterozygous for the recessive allele but do not that that trait

3. A long-haired cat (recessive trait s) is crossed with a heterozygous short-haired cat (dominant trait S). Which percentage of their offspring will have long hair?

A. 100 percent
B. 50 percent**
C. 25 percent
D. 0 percent

4. In humans, having dimples is a dominant trait. If one parent has dimples and is homozygous for the trait, what is the probability any of his or her offspring will NOT have dimples?

A. 100 percent
B. 50 percent
C. 25 percent**
D. 0 percent

5. In humans, having more than 5 fingers or toes is dominant over having exactly 5 fingers or toes. Which of the following situations is most likely result in exactly half of a couple’s offspring having 6 digits and half of them having 5?

A. Both parents are homozygous for this trait**
B. Both parents are homozygous
C. One parent is heterozygous while the other is homozygous for this recessive trait
D. One parent is homozygous for the recessive trait while the other is homozygous for the dominant trait

CHECK!
Answered by Anonymous
1. b
2. c
3. a
4. d
5. b
Answered by Mimmi
Well I don’t know if I trust you because usually Writeacher or Ms. Sue answers them.
Answered by Ms. Sue
Writeacher and I don't usually do this level of science questions.

As a matter of fact, Jiskha does not have a biology expert now.

Answered by Mimmi
Oh okay well is Anonymous’s answers correct since I don’t want to get them wrong!
Answered by Doug
I wouldn't trust Anonymous's answers.
Homozygous means that animal has two of the same allele. To guarantee an offspring will have a recessive trait (in problem 2) both parents must be homozygous in the recessive allele (if not, the child could get the dominant gene). If both parents have two recessive genes, they will have the recessive trait. Thus for problem 2, A is correct. In fact, answers B and C cannot exist.
Answered by Mimmi
Alright so is his answers for 3, 4, 5 correct?
Answered by Doug
for problem 3, crossing a Ss with a ss will give
Ss - short hair
Ss - short hair
ss - long hair and
ss - long hair.
Half have long hair and half have short, so the answer is B.
Answered by Mimmi
Or wrong?
Answered by Doug
in 4, if dimples is dominant and the parent is homozygous, the parent has two dimple genes, so every offspring MUST get a dominant dimple gene from that parent.
Answered by Mimmi
Good I chose B. Is 4 C?
Answered by Doug
5 is really a repeat of 3, and the answer there is c.
Answered by Mimmi
Thanks
Answered by Ms. Sue
Thanks, Doug.

Answered by john
you cant be on a re do and ask for answers. your teacher needs to know you understand it and you posted what i am almost sure is every question on the homework... :(
Answered by Mimmi
Well I got 4/5! And most of my answers were CORRECT
Answered by bea
so are the answers
1:b
2:a
3:b
4:c
5:a
Answered by Savannah
number 3 is 50% and number 5 is One parent is heterozygous while the other is homozygous for the recessive trait.
Answered by Talia
I got 4/5 but I will give you the answers.
1. b.
2. a.
3. b.
4. d.
5. c
Answered by smile more
Man I hate dealing with these I'm not a tutor but I will help


1. B
2. A
3. B
4. D
5. C
Answered by reality check
they are right
Answered by Math 7
talia and smile more are correct 100%
Answered by Sonic The Hedgehog
@Talia and @Smile More are 100% correct. Trust me, Sonic never lies.
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