Meiosis

Question 1

What is a part of meiosis I?

Answer 1

• Early Prophase I
• Mid-Prophase I
• Late-Prophase I
• Metaphase I
• Anaphase I
• Telophase I

Question 2

What is a part of meiosis II?

Answer 2

• Prophase II
• Metaphase II
• Anaphase II
• Telophase II
• it is a similar process to meiosis I except the resulting number of cells is four and each have a haploid # of cells

Question 3

What is ploidy?

Answer 3

• n = a set of chromosomes that includes exactly one homolog
• names are given to multiples of n:
• 1n = haploid
• 2n = diploid
• 3n = triploid, etc
• in humans, somatic cells are diploid and gametes are haploid

Question 4

Early Prophase I

Answer 4

• first duplicates all chromosomes

- centrosomes of to either poles of the nucleus

Question 5

Mid-Prophase I

Answer 5

• Chromosomes condese

- Spindles begin to form

Question 6

Late Prophase I (AKA Prometaphase)

Answer 6

• chromosomes begin to pair and then pairing with homologs occurs

Question 7

Metaphase I

Answer 7

• homologous pairs are lined up on equatorial planes

Question 8

Telophase I

Answer 8

• nucleus reforms and 2 daughter cells, each with diploid number of chromosomes

Question 9

What is non-disjunction?

Answer 9

• when homologous chromosomes are pulled apart and something goes wrong which results in both homologs ending up in one cell
• this results in the wrong number of chromosomes in one daughter cells which can affect the offspring