Meiosis

Question 1

what is the difference between meiosis and mitosis?

Answer 1

+ meiosis results in haploid cells (gametes)
+one round of DNA replication, two rounds of divisions

+ mitosis results in diploid cells

Question 2

what happens in mitosis at metaphase plate?

Answer 2

homologous chromosomes line up independently

Question 3

what happens in meiosis at metaphase plate?

Answer 3

homologous chromosomes are paired

Question 4

what is formed when replicated chromosomes align?

Answer 4

bivalent

Question 5

what is the result of nondisjunction in meiosis I?

Answer 5

failure of a pair of homologous chromosomes to separate in

Question 6

what is the result of nondisjunction in meiosis II?

Answer 6

failure of sister chromatids to separate during

Question 7

what is the result of fertilisation following meiotic errors?

Answer 7

trisomic zygote

Question 8

what happens after Meiosis I error?

Answer 8

uniparental heterodisomy

Question 9

what happens after Meiosis II error?

Answer 9

uniparental isodisomy