Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population.

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In genetics, the dash symbol (–) is a "wild card" that stands for either the dominant allele or the recessive allele; for exampl

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Answer:

12 : 3 : 1

white : yellow : green

Explanation:

Given that genes A and B control the fruit colour in following ways:

A_B_ or A_bb = white

aaB_ = yellow

aabb = green

The genes undergo independent assortment so:

AaBb X AaBb =

A_B_ : A_bb : aaB_ : aabb

9 : 3 : 3 : 1

white : white : yellow: green

12 : 3 : 1

Hence, ratio of white : yellow : green is 12: 3: 1

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3 years ago