Meiosis and Sexual Reproduction

Flashcards about Meiosis and Sexual Reproduction

Meiosis is a special type of cell division used only for __.

sexual reproduction

In non-gamete cells, humans have __ chromosomes.

46

__ cells have two chromosomes of each type.

Diploid (2n)

__ cells contain a single set of chromosomes.

Haploid (n)

Gametes fuse in __ to form a diploid (2n) zygote.

fertilization

Chromosomes of the same type are said to be __ chromosomes.

homologous

A __ is one of the two identical DNA molecules that make up a duplicated chromosome.

sister chromatid

The variants that exist for a gene are called __.

alleles

__ involves two nuclear divisions, Meiosis I and Meiosis II.

Meiosis

Homologous chromosomes pair up in __ during Meiosis I.

synapsis

In meiosis I, chromosome number is reduced from __.

2n to n

DNA is not replicated between __.

meiosis I and meiosis II

The four daughter cells produced in meiosis II are __.

haploid

Synapsed homologues are referred to as a __ (two homologues) or a tetrad (four chromatids).

bivalent

During Anaphase I, __ is reduced from 2n to n.

chromosome number

__ is similar to mitotic interphase, except it is usually shorter and DNA replication does not occur.

Interkinesis

Telophase II and cytokinesis produce four __ cells all genetically unique.

haploid (n)

__ halves chromosome number, producing four daughter nuclei that are genetically different.

Meiosis

__ preserves chromosome number, producing two daughter nuclei that are genetically identical.

Mitosis

During __ of Meiosis I, Synapsis and crossing-over occur.

Prophase I

During __ of Mitosis, Sister chromatids separate.

Anaphase