Meiosis and Genetic Variation

What is the primary cause of genetic variation during meiosis?

• chromosomes lining up

• "crossing over" of chromosomes

• separation of chromosomes

• chromosomes pulling apart

Tags

NGSS.HS-LS3-2

The process of "crossing over" occurs in what phase of meiosis?

• anaphase 1

• prophase 1

• prophase 2

• telophase 2

Tags

NGSS.HS-LS3-2

A pair of identical chromosomes (one inherited from mom and one inherited from dad) are called ______________________________.

• sister chromotids

• centromeres

• homologous chromosomes

• autosomes

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NGSS.HS-LS3-1

The failure of one or more pairs of homologous chromosomes or sister chromatids to separate "normally" during meiosis is called _____________________.

• nondisjunction

• anaphase I

• nondiploidy

• karyotype

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NGSS.HS-LS3-2

What is it called when a sperm and egg meet?

• meiosis
• fertilization
• cell division
• mitosis

Unlike mitosis, meiosis in male mammals results in the formation of

• one haploid gamete
• three diploid gametes
• four diploid gametes
• four haploid gametes

Tags

NGSS.HS-LS3-2

When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs

• crossing over
• mutagenesis
• hybridization
• fertilization

Tags

NGSS.HS-LS3-2

Which process and type of resulting cells are represented?

• mitosis, gametes
• mitosis, body cells
• meiosis, gametes
• meiosis, body cells

Tags

NGSS.HS-LS3-2

NGSS.HS-LS1-4

The chromosomes that pair up during meiosis, are called __________ chromosomes.  

• homozygous 
• asexual
• homologous
• genes

Tags

NGSS.HS-LS3-2

When homologous chromosomes match up, they form a structure call a ___________.

• tetrad
• triad
• diploid
• gamete

Tags

NGSS.HS-LS3-2