Meiosis and Genetic Variation Summative Quiz

Which option below best completes this sentence:

Genetic variation refers to

• the presence of genetic similarities between individuals

• the presence of genetic differences between individuals

• similarities in the DNA sequence between individuals

• differences in alleles between individuals

Genetic variation is promoted through ______________

During meiosis, genetic variation is promoted by

Crossing over occurs in which meiotic phase ?

• cytokinesis II

• anaphase I

• metaphase II

• prophase I

Describe the process of crossing over.

Explain how crossing over increases genetic variability in offspring.

The diagram shows some chromosomes during some stages of meiosis. When does the segregation of homologous chromosomes occur?

• Before stage 1

• Between stages 1 and 2

• Between stages 2 and 3

• Between stages 1 and 2 and again between stages 2 and 3

Without crossing over, there are ________________ possible chromosome combinations resulting from independent assortment and random segregation.

The diagram shows a diploid cell (2n=4) with genotypes.

Name the genotypes of possible daughter cells that have not undergone crossing over during meiosis.

The diagram shows a diploid cell (2n=4) with genotypes.

Name the genotypes of possible daughter cells that have undergone crossing over during meiosis.