Unit 6 Genetics & Spiral Review

How many chromosomes do gametes (sex cells) contain?

• 23 chromosomes (haploid)

• 46 chromosomes (diploid)

• 46 chromosomes (haploid)

• 23 chromosomes (diploid)

How many sets of chromosomes are in a diploid cell?

• 1 set

• 2 sets

How many sets of chromosomes are in a haploid cell?

• 1 set

• 2 sets

Gametes divide through ________

• DNA replication

• Mitosis

• Meiosis

• Cellular Respiration

How many chromosomes do somatic (body cells) contain?

• 23 chromosomes (haploid)

• 46 chromosomes (diploid)

• 46 chromosomes (haploid)

• 23 chromosomes (diploid)

Meiosis

• Reduces the number of chromosomes by one half

• Produces unique sex cells

• Allows traits to be passed on to offspring

• ALL ARE TRUE

• Increases genetic variation

Tags

NGSS.HS-LS3-2

What causes genetic variation in meiosis?

• chromosomes lining up
• crossing over of chromosomes
• separation of chromosomes
• chromosomes pulling apart

Tags

NGSS.HS-LS3-2

At the end of meiosis, you get...

• 4 identical daughter cells

• 4 unique daughter cells

• 2 identical daughter cells

• 2 unique daughter cells

Tags

NGSS.HS-LS3-2

Crossing over helps promote 

• male genotype
• genetic variation
• DNA replication
• mitosis

Tags

NGSS.HS-LS3-2

The exchange of chromosome segments between sister chromatids is called ________.

• Law of independent assortment

• Meiosis

• Crossing over

• Mitosis