Topic 5

Question 1

allele causes death at an early state of development so homozygous individuals do not appear in offspring

Answer 1

Recessive lethal mutation

Question 2

any individual possessing this allele will die eventually

Answer 2

Dominant Lethal Mutations

Question 3

phenotype of the heterozygote is the same as the homozygote for one allele

Answer 3

complete dominance

Question 4

phenotype of heterozygote is intermediate between phenotypes of the 2 homozygotes

Answer 4

incomplete dominance

Question 5

phenotype of both homozygotes is expressed

Answer 5

codominance

Question 6

the genotype does not always produce the expected phenotype

Answer 6

Incomplete penetrance

Question 7

the percentage of individuals having a particular genotype that express the expected phenotype

Answer 7

penetrance

Question 8

the degree to which a character is expressed

Answer 8

expressivity