Chapter 3 Flashcards
1
Q
What is a dihybrid cross?
A
- A cross between individuals that differ with respect to two traits
- YY . rr x yy . RR
2
Q
What is Mendel’s Second Law?
A
Gene pairs (on different chromosomes) assort independently while forming gametes
3
Q
Independent assortment results in:
A
50% recombinant gametes
4
Q
What is the ratio for a monohybrid F2 phenotype?
A
3:1
5
Q
What is the ratio for a monohybrid F2 genotype?
A
1:2:1
6
Q
What is the ratio of a monohybrid test-cross of het?
A
1:1
7
Q
What is the ratio for dihybrid F2 phenotype?
A
9:3:3:1
8
Q
What is the ratio of a dihybrid testcross from het?
A
1:1:1:1
9
Q
Mendel’s first law accounts for:
A
segregation of a pair of homologs by spindle attachment from each pole
10
Q
Mendel’s second law accounts for:
A
The randomness of spindle attachment
