Meosis

Question 1

What are the types of animal sex cells?

Answer 1

Spermocytes (male) and Oocytes (female)

Question 2

Meiosis leads to what?

Answer 2

Variations in traits among offspring

Question 3

What types of cells undergo meiosis?

Answer 3

Germ/Sex cells

Question 4

What happens in prophase 1?

Answer 4

• CROSSING OVER occurs between homologous chromosomes
• Spindle forms
• Nuclear envelope disappears
• Chromosomes condense

Question 5

What happens in Metaphase 1?

Answer 5

• Pairs of homologous chromosomes line up at spindle equator in a double-file line
• Random alignment

Question 6

What happens in anaphase 1?

Answer 6

Homologous/duplicated chromosomes are pulled apart from its own homologue, and migrate towards opposite spindle poles

Question 7

What happens in telophase 1?

Answer 7

• Nuclear envelope reforms
• Chromosomes decondense
• Cytokinesis
• Cell divides into 2 haploid cells

Question 8

What happens in prophase II?

Answer 8

• NO CROSSING OVER
• Spindle forms
• Nuclear envelope disappears
• Duplicated chromosomes condense

Question 9

What happens in metaphase II?

Answer 9

Duplicated chromosomes line up at the equator in a single-file line.

Question 10

What happens in anaphase II?

Answer 10

Sister chromatids are pulled apart and moved to opposite spindle poles

Question 11

What happens in telophase II?

Answer 11

• Nuclear envelope reforms
• Chromosomes decondense
• Cytokinesis
• Cell divides into 4 haploid gametes (egg or sperm)

Question 12

Difference between mitosis and meiosis?

Answer 12

Mitosis-clones are produced

Meiosis- Variations in traits among offspring