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Using Punnett squares to understand inheritance Use the following information to answer the questions below. Scenario 1: Rach
Value: 1 What is the chance that Ross and Rachels next child will not have dimples like Emma? a. 100% b. 75% c. 50% d. 25% e


Scenario 2: A truebreeding brown mouse is repeatedly mated with a true-breeding tan mouse, and all their offspring are tan Va
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Answer #1

Scenario 1)

volume (1) - Answer (B) because dimples are the dominant characters.

possible genotypes are DD, Dd, dD for parents and child having a recessive character genotype (dd).

Volume (2) -  Answer (D) AS scenario B is parents genotypes clearly shown the chances of recessive character is 1/4 i.e. 25%

Scenario 2)

true-breeding brown mouse *  true-breeding tan mouse

( BB )    ( bb)

breeding results in the F1 generation  

Bb Bb
Bb Bb

breeding results in the F2 generation

BB bB
Bb bb

volume (1) - Answer (B) as we can see there is only 25% for the recessive character in the F2 generation

volume (1) - Answer (c) 1:2:1

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