Meiosis and Genetic Variation

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

Tags

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Genetic variation is promoted through ______________

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

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.

Tags

NGSS.HS-LS3-2

Explain how crossing over increases genetic variability in offspring.

Tags

NGSS.HS-LS3-2

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.

Tags

NGSS.HS-LS3-2

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

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

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2