patterns of inheritance

Question 1

autosomal linkage

Answer 1

genes occur on the same chromosome
no independent assortment
alleles inherited together
unless crossing over occurs

Question 2

why does genetic bottleneck lead to low genetic diversity

Answer 2

many alleles are lost
population descended from few survivors

Question 3

state 3 conditions that must be present in order for speciation to occur

Answer 3

mutation
natural selection
time

Question 4

Explain, with reference to selective breeding, why it is important to maintain viable wild
populations of crop plant species.

Answer 4

genetic variation
source of useful alleles
can be cross-bred with other crops
allows the introduction of other traits
future requirements are unknown
source of replacement if the cultivated population is endangered

Question 5

genotype

Answer 5

the combination of alleles possesed by an organism

Question 6

alleles

Answer 6

are alternative versions of genes

Question 7

recessive alleles

Answer 7

only expressed when homozygous

Question 8

for hardy weinberg

Answer 8

use large populations to minimize effect of chance variation
random mating must occur
no migration