What is the phenotypic ratio of the offspring

9:3:3:1

Explanation:

9 of the 16 possible genotypes have a capital R and a capital Y. This means they all have the phenotype of round and yellow.

3 out of 16 have small r's and at least one capital Y. This gives a three in 16 chance for a crippled yellow phenotype. similarly, there's a 3 out of 16 chance to get the phenotype of round green phenotype.

There is only a 1 in 16 chance to get the phenotype of crippled green. Putting these numbers in a ratio gives 9:3:3:1.

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the answer would be 2, if crossing over doesn’t occur 2 out of 4 of the daughter cells will have that allele.

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