Question

Which of the following will not result in variations among siblings?

• A. Crossing over
• B. Independent assortment of genes
• C. Mutation
• D. Linkage

Answer 1

The correct option is D

Linkage

The correct option is D.

Explanation for the correct option:

1. In terms of genetics and genomics, linkage describes how closely genes or other DNA sequences are located to one another on the same chromosome.
2. The likelihood that two genes or sequences will be inherited together increases with their proximity on a chromosome.
3. Numerous factors, including selection, the rate of genetic recombination, mutation rate, genetic drift, the mating system, population structure, and genetic linkage, all have an impact on linkage disequilibrium.

Explanation for the incorrect options

Option A:

1. When chromosomes of the same kind are paired together during meiosis, a biological event called crossing over takes place.
2. Parts of the chromosome can be exchanged when two chromosomes, one from the mother and one from the father, line up.

Option B:

1. The development of reproductive cells causes various genes to separately separate from one another, according to the Principle of Independent Assortment.
2. Mendelian dihybrid cross is a good illustration of independent assortment.

Option C:

1. A mutation is a change in a gene's structure, which is how inheritance works.
2. Environmental elements known as mutagens are what trigger mutations.

Final answer: The process that will not result in variations among siblings is linkage.