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Question 18N.1.SL.TZ0.15

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Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.1.SL.TZ0.15
Level SL Paper 1 Time zone TZ0
Command term Deduce Question number 15 Adapted from N/A
15.
[Maximum mark: 1]
18N.1.SL.TZ0.15

In cats, black coat colour is dominant over gray. A female black cat, whose mother is gray, mates with a gray male. What is the predicted ratio of phenotypes in the offspring?

A.  100 % black

B.  50 % black to 50 % gray

C.  75 % black to 25 % gray

D.  100 % gray

 

[1]

Markscheme

B

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