Zoology - Principles of Inheritance and Variation Question with Solution | TestHub
Read the following four statements (A-D).
The characters blend in the heterozygous condition during Mendelian inheritance.
Change in a single base pair of DNA does not cause mutation.
Cancer cells can show chromosomal aberrations.
In insect, sex chromosomes in the male are ZZ and in females are ZW.
How many of the above statement is/are correct?
Options:
Answer:
Solution:
In heterozygous condition, the alleles express based on their dominance and recessiveness. The characters do not blend in this condition.
The mutation is caused by any change in the sequence of the DNA. Even if there is a change in a single base pair, it will lead to mutation.
Sex determination in insects is based on genetic constitution. In insects, male are heterozygous having XO and female are homozygous have XX chromosomal pairing.
Cancer occurs when the cells start to multiple indefinitely and uncontrollably. Cancer can occur due to mutation or aberrations in the chromosomes.
