Week 20 - Genotype to Phenotype II

Question 1

Dominant alleles always show up in the phenotype if present in the genotype. True or False

Answer 1

True

Question 2

Recessive alleles are “masked” by their dominant counterparts. True or False

Answer 2

True

Question 3

The recessive phenotype is exhibited only when 2 copies of the recessive allele are present. True or False

Answer 3

True

Question 4

When an individual is heterozygous (ex.Rr), the dominant allele produces the phenotype. True or False

Answer 4

True

Question 5

question on page 10

Question 6

question of page 12

Question 7

question on page 15

Question 8

Question on page 17

Question 9

Question on page 20

Question 10

Question on page 22

Question 11

Question on page 24

Question 12

Punnett Square:

Answer 12

easy way to calculate probability of different offspring genotypes, given parents’ gametes.

Question 13

Multiplication rule of probability:

Answer 13

to find probability of two independent events
occurring, multiply probabilities of each
event

Question 14

Question on page 31

Question 15

Question on page 33

Question 16

Question on page 35

Question 17

Discrete Traits:

Answer 17

traits that occur in distinct categories

are characteristics that can only take on a limited number of distinct, separate values within a population

Examples of discrete traits include eye color, blood type, and presence or absence of a particular genetic disorder.

Usually determined by single genes

Question 18

Are most traits not discrete or continuous?

Answer 18

continuous

Question 19

Incomplete Dominance

Answer 19

Neither version of a gene has dominance in a heterozygote, phenotype is a blend of the two genotypes.

Question 20

Polygenic traits

page 39 for better representation

Answer 20

Traits controlled by more than one gene

Ex: skin colour.

Question 21

Polygenic traits produces a more continuous distribution of phenotypes. True or False

Answer 21

True

Question 22

Phenotype = Genotype + Environment

Question 23

Phenotypic Plasticity:

Answer 23

Phenotypic plasticity refers to the ability of an organism to express different phenotypes (observable traits) in response to environmental changes without a corresponding change in its genotype (genetic makeup).

Question 24

Continuous traits

Answer 24

are characteristics that can take on a wide range of values within a population.

usually controlled by multiple genes

Examples of continuous traits include height, weight, blood pressure, and intelligence