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just olya [345]
3 years ago
5

Two individuals with the following genotypes are crossed: GGHhmm X GghhMm Assuming that the three gene loci are unlinked, what i

s the expected proportion of offspring from this cross that are genotype GgHhmm?
Biology
1 answer:
mart [117]3 years ago
6 0

Answer:

1/8

Explanation:

The following cross is done:

GGHhmm X GghhMm

If genes are unlinked they assort independently, and we can analyze one at a time to obtain the proportions in the offspring, and then multiply those probabilities to get the proportion of appearance of the GgHhmm genotype.

<u>Gene G/g</u>

P:  GG x Gg

F1: 1/2 GG, 1/2 Gg

<u>Gene H/h</u>

P:  Hh x hh

F1: 1/2 Hh, 1/2 hh

<u>Gene M/m</u>

P:  mm x Mm

F1: 1/2 Mm, 1/2 mm

Total proportion of GgHhmm genotype = 1/2 x 1/2 x 1/2 = 1/8

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