Lecture: #6 (Genes and Inheritance)

Question 1

Homozygous

Answer 1

BB or bb

Question 2

Heterozygous

Answer 2

Bb

Question 3

Pedigree

Answer 3

Pedigrees help us determine the alleles that individuals carry and the likelihood that the offspring of two individuals will exhibit a particular trait.

Question 4

Helpful hints about Trait Inheritance:

Dominant

Answer 4

One parent must be shaded to have a shaded kid; can’t skip generations

Individuals will be affected (shaded in) when they carry one dominant allele of a dominant trait (BB or Bb)

Question 5

Helpful hints about Trait Inheritance:

Recessive

Answer 5

The parents can be unaffected (not shaded in); can skip generations

Individuals will be affected (shaded in) when they carry two recessive alleles of a recessive trait (bb).

Question 6

the probability that one or both events occur

Answer 6

P(A or B) = P(A) + P(B)

Question 7

the probability that both events occur together

Answer 7

independent events: P(A and B) = P(A) * P(B)