chapter 8 Flashcards
1
Q
what are the 4 points in the law of segregation
A
- genes exist in alternative forma. a gene controls a specific trait in an organism
- an organism has two alleles for each inherited trait, one from each parent
- 2 alleles segregate during meiosis, resulting in gametes that carry only one allele for any given inherited trait
- medel’s law of dominance
2
Q
what is mendels law of independent assortment
A
the inheritance of one trait is completely independent of any other
3
Q
when can nondisjuction occur
A
in meiosis 1 or 2
4
Q
when does chromosomal breakage occur
A
as a result of mutagenic agents and XRays
5
Q
what are examples of mutagenic agents
A
cosmic rays, X-rays, UV rays, radioactvity
6
Q
what is genetic drift
A
changes in gene pool due to chance
