8. In a species of grass, height is determined by 6 genes. Each gene has two all

Question

8. In a species of grass, height is determined by 6 genes. Each gene has two alleles, one allele contributes 1cm to plant height and the other is non-contributing (adds 0 cm to height). If a plant that is aabbccddeeff is 10cm tall (all alleles noncontributing) and a plant that is AABBCCDDEEFF is 22cm tall (all alleles contributing).

a. If you cross aabbccddeeff x AABBCCDDEEFF, what will be the height of the progeny?

b. If you cross the F1 from above to itself, what proportion of the F2 progeny will be 15cm tall?

c. What proportion of the F2 progeny will be 10cm?

Explanation / Answer

the height of non contributing allelegrass is 10 cm to increase in hight is 22-10=12 cm bacause of contributuoin allele.

1. Now cross of aabbccddeeff to AABBCCDDFF, WOULD GIVE aAbBcCdDeEfF that will give additional 6 cm to 10cm so height of progeney would be 16 cm

2. Now self cross will give 26 number of gamete and no of progeny would be 64x64=4096

type of progeny in that 1/6 would be having 15 cm height. so it is around 682

3. only one among that would be 10 cm

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