Principle Of Inheritance And Variation Question 245
Question: Assertion : Heterochromatin is genetically inactive. Reason : It lacks genes.
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: C
Solution:
Genetic analyses indicate that heterochromatin is largely genetically inactive. Most of the genes of eukaryotes that have been extensively characterized are located in euchromatic regions of the chromosomes. The earlier belief that no genes are found in heterochromatic regions is not correct, because genes could be located in heterochromatic regions in several cases like Drosophila and tomato. The genes in heterochromatic region perhaps become active for a short period.
BETA
