Crossing Over

What does the image demonstrate

• Punnet squares

• Crossing over

• Metaphase

• Dna replication

Tags

NGSS.HS-LS3-2

During what phase does crossing over occur?

• Interphase

• Prophase I

• Prophase II

• Cytokinesis

The end result of meiosis is...

• 4 identical cells

• 4 genetically different cells

• 2 identical cells

• 2 genetically different cells

CROSSING OVER INCREASES

• LIFE SPAN

• GENETIC VARIATION

• THE NUMBER OF OFF-SPRING

• ALL ARE TRUE

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

What is genetic recombination?

• The combination of genes produced by crossing over and independent assortment.

• When genes located close to each other on the same chromosome tend to travel together during meiosis.

• A map that shows the sequence of genes on a chromosome.

• The occurrence of one or more extra sets of chromosomes.

Tags

NGSS.HS-LS3-2

During which stage of meiosis does crossing over typically occur?

• Metaphase I

• Anaphase I

• Prophase I

• Telophase I

Tags

NGSS.HS-LS3-2

What is the primary purpose of crossing over during meiosis?

• To increase genetic diversity

• To reduce chromosome number

• To replicate DNA

• To separate sister chromatids

Which structure is primarily involved in the process of crossing over?

• Centromere

• Chiasma

• Spindle fiber

• Nucleolus

How does crossing over contribute to evolution?

• By creating identical offspring

• By increasing genetic variation

• By eliminating mutations

• By stabilizing chromosome number

Tags

NGSS.HS-LS4-2