Lecture 3 - Mendelian Genetics

Question 1

genone

Answer 1

haploid set of chromosomes that define a species

Question 2

gene

Answer 2

a unit of inheritance that has one or more specific effects on the phenotype of an organism

Question 3

allele

Answer 3

a different version/variant of the same gene

Question 4

locus

Answer 4

a specific physical location on a chromosome

Question 5

Mendel’s 1st law

Answer 5

principle of segregation

Question 6

what is the Principle of Segregation

Answer 6

alleles segregate from each other during gamete formation in equal numbers

Question 7

what is the probability of getting a AA in F2

Answer 7

25%

Question 8

what is the probability of getting a Aa in F2

Answer 8

50%

Question 9

Mendel’s 2nd law

Answer 9

Principle of independent assortment

Question 10

what does the Principle of Independent Assortment mean

Answer 10

genes segregate independently from other genes

Question 11

what are examples of intralocus interactions

Answer 11

dominance and additive gene action

Question 12

what does intralocus mean

Answer 12

within a locus

Question 13

what does interlocus mean

Answer 13

between other locus’s

Question 14

examples of interlocus interactions

Answer 14

epistasis
linkage
pleiotrophy

Question 15

epistasis

Answer 15

the expression of one gene masks the expression of another

Question 16

dominance

Answer 16

the expression of 1 allele masks the expression of the other allele in a heterozygous condition

Question 17

types of epistatis

Answer 17

classic (no epistais), dominant, recessive, duplicate recessive, duplicate dominant

Question 18

ratio of classic (no epistasis) with 2 genes

Answer 18

9:3:3:1

Question 19

ratio of dominant epistasis with 2 genes

Answer 19

12:3:1

Question 20

ratio of recessive epistasis with 2 genes

Answer 20

9:3:4

Question 21

ratio of duplicate recessive epistasis with 2 genes

Answer 21

9:7

Question 22

ratio of duplicate dominant epistasis with 2 genes

Answer 22

15:1