Question

How does meiosis rase the genetic variability in a population of organisms from one generation to the next?

a. independent assortment allows maternal and paternal chromosomes to be shuffled as gametes form.
b. genetic mutations caused by deletions
c. it changed the number of chromosomes in the organisms from generation to generation
d. genetic recombination allows maternal and paternal alleles on a given chromosome to be shuffled

- a+b+c+d

- a+c

- b+d

- a+d

- a+b+d

Answer 1

Meiosis raises genetic variability through independent assortment and genetic recombination, leading to numerous possible combinations of chromosomes and alleles in gametes.

Step-by-step explanation:

How does meiosis raise the genetic variability in a population of organisms from one generation to the next? Options a and d are correct. This genetic variability is achieved through two main processes during meiosis:

• Independent assortment: This occurs during metaphase I of meiosis, where homologous chromosomes line up randomly at the metaphase plate. Each gamete has an equal chance of receiving either a maternal or paternal chromosome, leading to a variety of combinations when the gametes combine during fertilization.
• Genetic recombination: Also known as crossing-over, this occurs during prophase I of meiosis. It involves the exchange of genetic material between nonsister chromatids of homologous chromosomes, resulting in new combinations of alleles.

The correct answer to the student's question is 'a+d'.