Question

the height of a plant is under the control of polygenic inhritance. the plant having genotype aabb has 20 cm height and height of plant having genotype AaBb is 50 cm what will be height of plant having AABB genotype

Answer 1

Answer:

Here, minimum height is given i.e 20cm (as all the alleles of aabb are recessive)

Height of plant having genotype AaBb is also given i.e 50cm

Here, in genotype AaBb, 2 dominant polygenes are present.

Height of plant = Minimum height + Contribution of dominant polygene

i. e.,

50 = 20 + (2 x Contribution of each dominant polygene )

Contribution of each dominant polygene = 30/2 = 15

Height of plant having genotype AABB= 4×15=60 cm

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