Question

Continuous variation is due to
A. Chromosomal aberration
B. Polyploidy
C. Mutation
D. Crossing over

Answer 1

Hint:
Now we will discuss the continuous variation
Continuous variations are the ones that display the character's full range of variations; they do not just convey two extremes but also the entire range. Continuous traits are governed by multiple genes, and each gene contains two to several alleles that greatly vary the trait. Additionally, crossover occurs during prophase I of meiosis and results in new allelic combinations, giving the character a broad range of phenotypes.

Complete step by step answer:
Continuous variations are the ones that display the character's full range of variations; they do not just convey two extremes but also the entire range. Continuous traits are governed by multiple genes, and each gene contains two to several alleles that greatly vary the trait. Additionally, crossover occurs during prophase I of meiosis and results in new allelic combinations, giving the character a broad range of phenotypes.
Comparable to quantitative inheritance, this variation connects the extremes through a sequence of intermediate kinds. Continuous variation describes steady changes in attributes like weight or height. The height of a person could range from the shortest to the tallest person in the world. Things like a person's height and weight are examples of continual change. The blood type of a person or a bird's colour are two examples of discontinuous variation.
Therefore, continuous variations are due to over crossing.

Option ‘D’ is correct

Note:
Chromosomal aberrations, which include inversion, duplication, deletion, and translocation, are changes to the chromosomes' structural makeup or number. Polyploidy is the existence of numerous complete haploid chromosome sets. The term "mutation" refers to a change in the gene's chemical makeup. Mutation, polyploidy, and chromosomal aberration do not result in novel allelic combinations.