genetics 3

Question 1

a change in environment can affect the…

Answer 1

phenotype of an individual

Question 2

phenotypic plasticity

Answer 2

the degree to which your phenotype is determined by your genotype

Question 3

If environmental factors have a strong influence the phenotypic plasticity is…

Answer 3

high

Question 4

If genotype can be used to reliably predict phenotype, phenotypic plasticity is

Answer 4

Low

Question 5

examples of non-mendelian inheritance

Answer 5

1. co-dominance
2. Incomplete dominance
3. Pleiotropy
4. Polygenic inheritance

Question 6

Co-Dominance

Answer 6

In this inheritance pattern the characters have more than the 2 typical alleles.
-2 alleles are inherited still tho

Question 7

3 alleles for human blood types

Answer 7

A,B,O

Question 8

how blood typing (co-dominance) differs from mandelian

Answer 8

• more than one set of alleles
  -In AB blood types neither one is dominant (produces new genotypes)

Question 9

Incomplete dominance

Answer 9

Heterozygous genotypes produce a phenotype which is a blended combination of the dominant and recessive phenotype

Question 10

Hypercholesterolemia

Answer 10

cholesterol higher than normal
unaffected: HH
Heterozygous: Hh (high risk)
Homozygous recessive: hh (normal)

Question 11

Incomplete dominance differs from mandelian pattern because…

Answer 11

this is a mixture of both/ not just one or another

Question 12

Pleiotropy

Answer 12

one gene gives multiple different traits
-very rare
-ex: sickle cell anemia

Question 13

how pleiotropy differs from mandelian pattern

Answer 13

in mandelian pattern
one gene= one trait

pleiotropy
one gene= multiple traits

Question 14

polygenic inheritance

Answer 14

many genes make one phenotype
-the more dominant alleles an individual inherits, the more it adds to the phenotype