Principle Of Inheritance And Variation Question 387
Question: Assertion : Allopolyploidy is developed between hybridisation of two species. Reason : Amphidiploids are also allopolyploids.
Options:
A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
Show Answer
Answer:
Correct Answer: B
Solution:
Allopolyploids may also result from doubling of chromosome number in a $ F_1 $ hybrid which is derived from two distinctly different species.
This will bring two different sets of chromosomes in this $ F_1 $ hybrid.
The doubling of chromosomes in this $ F_1 $ hybrid (AB) will give rise to a tetraploid with two A and two B genomes.
Such a polyploid is called an allopolyploid or amphidiploid.
BETA
