Meiosis

How many sets of chromosomes are in a human haploid (n) cell?

1

In humans, 2n = 46. A human gamete contains ______ chromosomes, and a human zygote contains ______ chromosomes.

23 and 46

In an animal with a diploid number of chromosomes 2n = 8, a gamete has ______ chromosomes, a muscle cell has ______ chromosomes, and a germ cell at meiotic anaphase I has ______ chromosomes.

4, 8, 8

If a cell that contains this pair of homologous chromosomes goes through meiosis without crossing over, what allele combinations (genotypes) will the daughter cells contain?

AB or ab

If a crossover occurs between these two genes, as shown in the diagram, what allele combinations (genotypes) will the resulting gametes contain?

AB, Ab, aB, ab

A pair of homologous chromosomes that have synapsed with one another is called a

bivalent

The structure that is visible at the location where two homologous chromosomes cross over one another is called a...

chiasma

Which of the following cell types are gametes? A.egg B.zygote C.sperm D.germ cell E.somatic cell

egg and sperm

Meiosis results in the production of...

four haploid daughter cells

In animals, a cell that was produced by meiosis is called a:

gamete

Which of the following types of cells are haploid? A.gamete B.somatic cell C.germ cell D.spore E.zygote

gamete and spore

When do homologous chromosomes separate?

meiosis I

How does prophase of mitosis differ from prophase I of meiosis?

synapsis occurs in prophase I of meiosis but not in prophase of mitosis.

Chromosome number is reduced during meiosis because the process consists of...

two cell divisions but only a single round of chromosome replication.