17.2- Extending Mendels laws

Question 1

genes that do no assort independently are called _____

Answer 1

linked Genes

Question 2

how could 2 genes from the same chromsomes end up in different gametes

Answer 2

crossing over

Question 3

genes far away on the same chromsomes are _____ likely to _____

Answer 3

more likely to be separated by crossing over

Question 4

crossing over frequency is measured as a ___

Answer 4

%

Question 5

1% cross over frequency= =

Answer 5

1 map unit distance between genes

Question 6

recombinant types=

Answer 6

chromsomes with different allele combos in the F1 than were present in the parents

Question 7

parental types=

Answer 7

F1 individuals with the same allele combinations as the parents

Question 8

formula for recombination frequency =

Answer 8

recombination frequency= # recombinant offspring/total # of offspring x100%

Question 9

why would males and females produced from the same cross produce consistently different frequencies?

Answer 9

some traits are found on sex chromsomes, most often the X chromsome

Question 10

if a trait is X-linked recessive, how many copies must a female have to express the trait

Answer 10

2

Question 11

if a trait is X-linked recessive, how many copies must a male have to express the trait

Answer 11

1 (only 1 x present and 1 y)

Question 12

what did Morgan investigate

Answer 12

sex linkage- he saw unique inheritance of sex chromosme traits

Question 13

3 alleles for blood type

Answer 13

I^A I^B i

Question 14

I^a and I^B are ____

Answer 14

co dominant

Question 15

I is ____

Answer 15

recessive

Question 16

what is the order of dominance

Answer 16

some alleles show up I a hierarchy of dominance over others