Chapter 12

Question 1

genotype

Answer 1

responsible for phenotype

Question 2

phenotype

Answer 2

traits

Question 3

gene

Answer 3

section of DNA that codes for a trait, protein, RNA

Question 4

allele

Answer 4

variation of the gene

Question 5

why does segregation of alleles occur

Answer 5

because of the segregation of homologous chromosomes during meiosis

Question 6

monohybrid cross

Answer 6

2 parents, 1 trait, expected outcome 3:1, genotypic ration 1:2:1

Question 7

dihybrid cross

Answer 7

parent- heater but for 2 traits, 4 possible combos between phenotype, phenotype traits 9:3:3:1

Question 8

incomplete dominance

Answer 8

dominant allele is not completely dominant and it gives a blended phenotype

Question 9

multiple allelic traits

Answer 9

has more than two alleles

Question 10

penetrance

Answer 10

have the right genes but they are not utilized

Question 11

expressivity

Answer 11

variation in way traits are displayed

Question 12

pleiotropy

Answer 12

1 stimulus produces a variety of outcomes

Question 13

epistasis

Answer 13

one genotype can affect phenotype of another gene

Question 14

polygenic inheritance

Answer 14

multiple genes account for phenotype (blood type)