AP BIOLOGY

HEREDITY

MULTIPLE ALLELES

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

If two checkered chicks (BW) are crossed, what are the offspring?

A	100% checkered
B	50% white, 50% black
C	25% white, 50% checkered, 25% black
D	100% grey

Explanation:

Detailed explanation-1: -Gray: 100% Cross a BLACK chicken (BB) with a WHITE chicken (WW). These alleles show INCOMPLETE DOMINANCE.

Detailed explanation-2: -In chickens, black and white feathers are codominant. Heterozygous chickens have a checkered pattern.

Detailed explanation-3: -Count the total number of boxes in your Punnett Square. This gives you the total number of predicted offspring. Divide the (number of occurrences of the phenotype) by (the total number of offspring). Multiply the number from step 4 by 100 to get your percent.

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