NS B/B

Question 1

Distribution for a dihybrid cross

Answer 1

9:3:3:1

Question 2

Sex-linked vs autosomal

Answer 2

autosomal are on chromosomes 1-22, SL is on 23
males have XY and Y is empty is they only have one allele for sex linked genes. If there are two alleles for males then it is autosomal. Also why males express recessive sex linked diseases in higher proportions then females

Question 3

The movement of intracellular cargo along microtubules is mediated by two motor proteins:

Answer 3

Kinesin: Moves intracellular cargo along microtubules in anterograde axonal transport (ie, away from the nucleus and toward distal sites).

Dynein: Participates in retrograde axonal transport of intracellular cargo (ie, from distal sites toward the nucleus

Question 4

A woman carries an X-linked recessive allele for a disorder characterized by muscle degeneration but does not express this condition. If she has multiple offspring with an unaffected man, how many of the woman’s children are expected to exhibit this degenerative disorder?

Answer 4

1/4 because mom is recessive has (Mm) and will pass (M) on to half of her kids half of which are gonna be boys which equals 1/4

Question 5

Parallel evolution

Answer 5

Parallel evolution occurs when two more closely related species (ie, descended from a more recent common ancestor) continue to evolve the same characteristics to adapt to similar environments.

Question 6

Divergent evolution

Answer 6

Divergent evolution occurs when two species descended from a recent common ancestor inhabit contrasting environments and evolve distinct characteristics

Question 7

Convergent evolution

Answer 7

Convergent evolution leads to similar characteristics in distantly related species that are exposed to similar environmental pressures