10.1 Meiosis (HL) IB Biology

What is a chiasma?

• A point where homologous chromosomes remain in contact during meiosis

• A point where gene mutations occur

• A point where the recombination of genetic material always occurs

• A process of exchanging genes between non-homologous chromatids

In which stage in meiosis is the chromosome number reduced from diploid to haploid?

• During pairing of chromosomes in the first division of meiosis

• During pairing of chromosomes in the second division of meiosis

• When chromosomes move to opposite ends of the cell during the first division of meiosis

• When chromosomes move to opposite ends of the cell during the second division of meiosis

Which response describes the behavior of chromosomes in metaphase I and Anaphase II of meiosis

• A

• B

• C

• D

T/F: A zygote is a sex cell.

• Truee

• False

Tags

NGSS.HS-LS3-2

Humans have a total of how many diploid chromosomes?

• 23 pairs

• 22 pairs

• 48 chromosomes

• 22 individual chromosomes

How is the doubling of chromosomes prevented in each generation?

• Meiosis is a halving mechanism

• Mitosis occurs

• Body cells combine to form a zygote

• All gametes are diploid

Tags

NGSS.HS-LS3-2

This is the attachment point between two sister chromatids

• Centromere

• Centriole

• Chromatid

• Chiasma

Tags

NGSS.HS-LS1-4

Crossing over results in... (select all that apply)

• Genetic mutation

• Recombination of alleles

• Genetic diversity

• Non-homologous chromosomes trading places

A homologous pair of chromosomes associates during Prophase I through synapsis and creates a...

• Bivalent

• Non-disjunction event

• New chromosome

• Histone Complex

How many chiasma are in this drawing?

• 2

• 3

• 4

• 5

Tags

NGSS.HS-LS3-2