Question

The allele for a widow’s peak has complete dominance over the allele for a straight hairline (w). What is the probability of two parents heterogeneous for a widow’s peak (Ww) having an offspring without a widow’s peak?
Answer
0%
25%
50%
75%

Answer 1

I am going to help you with just one of your questions. Users tend to get more out of the site when they treat it as a tutoring experience and post questions one at a time. They also tend to get more out of it when they include in their post a guess or tell us what specifically about the question is not understood.

The question tells you that both parents are heterozygous - that is, Ww - for widow's peak. That means that each child has a 25% chance of being homozgyous dominant; a 50% chance of being heterozygous and a 25% chance of being homozygous recessive. That is, 25% + 50% = 75% of offspring will have a widow's peak and 25% won't.

In this case, homozygous recessive corresponds to the phenotype - no widow's peak - which you want the probability of, so the correct answer is 25%.

Clear?

Answer 2

Im sorry it just that i just found this site today and ive had this homework for a while and didnt know how to do it :/

Answer 3

the correct answer is not 25%

Answer 4

So wait, what IS the correct answer??

Answer 5

Idk, I just had this question on a test and 25% is what I put and I got it wrong.

Answer 6

http://openstudy.com/study#

Answer 7

@iKitlen

Answer 8

@RAINBOWDASHROCKS

Answer 9

i keep getting 25 percent

Answer 10

I got 75%?

Answer 11

Meeeeh im the odd one out LOL

Answer 12

but it says without a widow peak

Answer 13

I know. I still got 75%.

Answer 14

really?

Answer 15

how

Answer 16

Really really. I might just be doing it wrong, but thats what I got.

Answer 17

WW 25% Ww Ww 50% ww 25% these r my results

Answer 18

@RAINBOWDASHROCKS

Answer 19

@RAINBOWDASHROCKS

Answer 20

I gtg soon tho

Answer 21

75%

Answer 22

alright ill try both and see which one works

Answer 23

thanks guys

Answer 24

no prob

Answer 25

Np.