Part G: Lecture 21

Question 1

meiotic recombination (def.)

Answer 1

any process that generates recombinant gametes/offspring

Question 2

meiotic recombination in single-celled eukaryotes

Answer 2

input: two haploid cells
output: haploid cells that are parental or recombinant

Question 3

recombinant haploid cells

Answer 3

allele combinations in gamete that didn’t exist in parental gametes

Question 4

meiotic recombination in multicellular eukaryotes

Answer 4

input: two haploid cells
output: haploid cells that are parental or recombinant

Question 5

differences with meiotic recombination in multicellular eukaryotes

Answer 5

a)diploids are multicellular and haploid cells are gametes
b)diploid parents make haploid cells
c)Test cross is used to observe results of meiosis
d) parentals and recombinants can be distinguished in F2 offspring

Question 6

parental gametes -> ____offspring

Answer 6

parental

Question 7

recombinant gametes -> ____offspring

Answer 7

recombinant

Question 8

independent assortment of chromosomes (___) that leads to ____

Answer 8

(genes are on different chromosomes)
recombinant gametes

Question 9

Recombination frequency (def.)

Answer 9

proportion of offspring that is recombinant

Question 10

If genes are on different chromosomes, the recombination frequency (RF) is ___

Answer 10

50%

Question 11

If genes are on same chromosomes, the recombination frequency (RF) is ___

Answer 11

< 50%

Question 12

assortment possible if genes are on same chromosomes

Answer 12

-no crossover –> no recombinant gametes
-crossover –> half gametes are recombinant

Question 13

RF were different for ____ and ___

Answer 13

each pair of genes
repeatable

Question 14

RF is the same as ___

Answer 14

map units

Question 15

distances on linear chromosomes are expressed in ____ or _____

Answer 15

genetic map units (mu)
centiMorgans (cM)

Question 16

1% RF = ___ = ____

Answer 16

1 mu = 1 cM

Question 17

One gene can be ____ or ___

Answer 17

autosomal
sex-linked (on X/Z chromosome)

Question 18

Two genes can be ___ or _____

Answer 18

linked or not-linked

Question 19

linked genes

Answer 19

On the same chromosome and <50 mu

Question 20

not linked genes

Answer 20

on different chromosomes
on same chromosome and >50 mu