a model of cell division is shown here. a student evaluates the model and makes the claim that the cell…

a model of cell division is shown here. a student evaluates the model and makes the claim that the cell division increases genetic variation in the daughter cells. which evidence from the model supports the students claim? a chromosomes pair in step 2. b chromatids separate in step 5. c chromosomes are replicated in step 1. d chromosomes exchange genetic material in step 3.

a model of cell division is shown here. a student evaluates the model and makes the claim that the cell division increases genetic variation in the daughter cells. which evidence from the model supports the students claim? a chromosomes pair in step 2. b chromatids separate in step 5. c chromosomes are replicated in step 1. d chromosomes exchange genetic material in step 3.

Answer

Brief Explanations:

Genetic variation in cell - division is enhanced by crossing - over. When chromosomes exchange genetic material (cross - over), new combinations of genes are formed in the daughter cells. This occurs during meiosis. In the given options, chromosomes exchanging genetic material in step 3 is the process of crossing - over which increases genetic variation. Chromosome pairing (option A) is just a step in meiosis but doesn't directly increase variation. Chromatid separation (option B) is part of normal cell - division process and doesn't add new genetic combinations. Chromosome replication (option C) just duplicates the existing genetic material and doesn't create new combinations.

Answer:

D. Chromosomes exchange genetic material in step 3.