Ext. Mendelian Inheritance Lecture 15

Question 1

a phenotype intermediate between the homozygous dominant and homozygous recessive phenotypes

Answer 1

incomplete dominance

Question 2

in human blood groups the fact that an individual can have an AB blood type is an example pf

Answer 2

codominance

Question 3

An individual with type a blood and an individual with type B blood mate and have an offspring. What is the only blood type can you be CERTAIN is possible in their offspring?

Answer 3

type AB blood

Question 4

Epistasis is

Answer 4

when one gene can mask the expression of a second gene

Question 5

sickle-cell anemia in humans is an example of

Answer 5

overdominance/heterozygote advantage

Question 6

term that refers to the situation where the effects of one gene mask the phenotype effects of another gene

Answer 6

epistasis

Question 7

the multiple effects of a single gene on the phenotype of an organism is called

Answer 7

pleiotropy

Question 8

one with potential to cause death inherited in recessive manner and usually resulted from mutations

Answer 8

lethal allele

Question 9

allele dominant in one sex nd recessive in another

Answer 9

sex-influenced inheritance

Question 10

an allele doesn’t always “penetrate” into the phenotype of the individual

Answer 10

incomplete penetrance

Question 11

heterozygote is more vigorous than two homozygous

Answer 11

overdominance / heterozygote advantage

Question 12

three or more alleles eg ABO blood type

Answer 12

multiple allele system

Question 13

each recessive allele is complemented by wild type allele - indicates recessive alleles are in different genes

Answer 13

complementation

Question 14

overdominance reasons

Answer 14

1. disease resistance
2. homodiner formation
   3, variation in functional activity

Question 15

multiple effects of a single gene on the phenotype

Answer 15

pleiotropy

Question 16

describe at population level

Answer 16

penetrance

Question 17

effects of one gene mask the phenotype of another gene

Answer 17

epistasis

Question 18

how affected an individual may be by mutation

Answer 18

expressivity

Question 19

heterozygote more vigorous than the two homozygous

Answer 19

overdominance

Question 20

if phenotype is expressed, described on population level

Answer 20

penetrance

Question 21

how affected an individual may be by mutation

Answer 21

expressivity