Lecture 20A

Question 1

What is a discrete trait

Answer 1

phenotypes that fall into a few distinct classes
(color of peas
ABO Blood group
rolling tongue)

Question 2

what is a polygenic trait

Answer 2

phenotypes display a (bell-shaped) normal distribution
(height, skin color, hair color )

Question 3

inheritance of discrete traits involves what type of alleles

Answer 3

dominant and recessive alleles

Question 4

polygenic traits show what type of curve in a population

Answer 4

bell shaped curve

Question 5

true or false: environment affects phenotype

Answer 5

true

Question 6

example of environment affecting phenotype

Answer 6

temperature:

panting one plant in a warm place and another in a cooler spot. warm plant grows better