chapter 8

Question 1

what are the 4 points in the law of segregation

Answer 1

1. genes exist in alternative forma. a gene controls a specific trait in an organism
2. an organism has two alleles for each inherited trait, one from each parent
3. 2 alleles segregate during meiosis, resulting in gametes that carry only one allele for any given inherited trait
4. medel’s law of dominance

Question 2

what is mendels law of independent assortment

Answer 2

the inheritance of one trait is completely independent of any other

Question 3

when can nondisjuction occur

Answer 3

in meiosis 1 or 2

Question 4

when does chromosomal breakage occur

Answer 4

as a result of mutagenic agents and XRays

Question 5

what are examples of mutagenic agents

Answer 5

cosmic rays, X-rays, UV rays, radioactvity

Question 6

what is genetic drift

Answer 6

changes in gene pool due to chance