6.4 Book

Question 1

Synapsis

Answer 1

Synapsis – the state of homologous chromosomes laying side by side during Prophase I of meiosis.

Question 2

Chiasmata

Answer 2

contact points between chromatids of homologous chromosomes

Question 3

Crossing over

Answer 3

the process during meiosis in which chromatids break and re-join onto other chromatids, resulting in chromatids swapping genes at the same loci.

Question 4

Recombination

Answer 4

breaking and re-joining of pieces of chromosome during crossing over leading to a new combination of alleles.

Question 5

Law of segregation

Answer 5

the principle that half the gametes formed during meiosis contain one member of each gene pair and half contain the other pair.

Question 6

Law of independent assortment

Answer 6

the principle that genes on different homologous chromosomes separate independently into gametes during meiosis.

Question 7

Non-disjunction

Answer 7

the failure of paired chromatids in mitosis or homologous in meiosis to separate and go to opposite poles.

Question 8

Zygote

Answer 8

The diploid cell that results from the fusion of two haploid gametes