Meiosis

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

If a stem cell has 24 chromosomes, how many will it have at the end of meiosis?

• 24
• 12
• 6
• the number varies per species

A haploid cell has 

• one-half of a set of chromosomes
• one set of chromosomes
• two sets of chromosomes
• four sets of chromosomes

Tags

NGSS.HS-LS3-2

Crossing over is important because....

• It prevents mutations from entering the gametes. 
• It allows for even distribution of chromosomes in the gametes.
• It allows for more genetic diversity of gametes.
• It allows for genetic uniformity of gametes. 

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

How many cells are created by the end of MEiosis II?

• 1

• 2

• 3

• 4

When does crossing over occur?

• Interphase
• Prophase 1
• Prophase 2
• Metaphase 1

Tags

NGSS.HS-LS3-2

What is one of the advantages, why is it better to reproduce sexually versus asexually?

• survival of the fittest
• overproduction
• genetic variation
• cloning

Tags

NGSS.HS-LS3-2

NGSS.HS-LS4-2

Identify the phase.

• Telophase I
• Telophase II
• Metaphase I
• Metaphase II

Tags

NGSS.HS-LS1-4

Meiosis makes sperm and egg cells. In humans, sperm and egg cells each have _____ chromosomes. Therefore a fertilized human egg cell (sperm and egg cell combined) would create a cell with _____ chromosomes.

• 23, 46
• 46, 23
• 2, 4
• 50, 100

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Human eggs and sperm are _____, and each has ____ chromosomes.

• diploid, 23
• diploid, 46
• haploid, 23
• haploid, 46

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2