A tetra-hybrid plant produces fruits of 1 kg while minimum weight is 400 g. What will be the maximum weight of a fruit ? (1) 600 g (2) 1600 g (3) 1200 g (4) 1800 g

1 Answer
Kashish ยท Stefan V.
Apr 23, 2018

"1600 g"

Explanation:

This is a question of Polygenic inheritance. When all the alleles are recessive, we get minimum weight condition and when all the alleles are dominant, we get maximum weight condition.

In a tetrahybrid condition ("AaBbCcDd"), the weight of the plant is "1000 g", i.e minimum weight + weight due to four dominant alleles.

Therefore, the weight of four dominant alleles = "1000 g" - "400 g" = "600 g".

Now, the weight due to 8 dominant alleles = "minimum weight" + 2 xx "600 g" = "400 g" + "1200 g" = "1600 g".

Let me know if you didn't understand this properly.
P.S. I also gave this test yesterday!

Related questions
See all questions in Chromosomal Genetics
Impact of this question
6086 views around the world
You can reuse this answer
Creative Commons License