pff exam exam #3

chp. 11,16,18-20, 22-25

what is genetic drift?

changes that occur due to chance

• it would have a greater impact on a small population

are the rhizoids in moss real roots?

no

is bread wheat a diploid, quadruploid, or a hexaploid?

hexaploid (2n = 42)

what is a gene pool?

the sum total of all the alleles of the genes of all the individuals in the population

in a Hardy- Weinberg equilibrium, what does p mean, what does q mean, how do we calculate p, q, percentage of homozygous dominant plants, percentage of recessive dominant plants, and the percentage of heterozygous plants?

• p= frequency of dominant allele (p=1-q)

• q= frequence of recessive alelle (sq root of q²)

• % of homozygous dominant = p²

• % of recessive dominant = q²

• % of homozygous plants = 2pq

as an example of rapid evolutionary change, one variety of Agrostis grows much faster on tailings and dumps around abandoned lead mines than does another variety. what is the explanation for this?

How do gymnosperms (such as a pine tree) do pollination?

What are the fertile parts of a flower, and what are the non-fertile parts of a
flower?