Single Factor crosses II Flashcards
1
Q
Test cross:
A
A dominant phenotype (TT or Tt) is crossed with a homozygous recessive phenotype.
A test to find out the genotype of the dominant allele.
2
Q
What is needed for a test cross:
A
Multiple offspring are needed for a test cross to be accurate.
3
Q
Example of incomplete dominance:
A
Four o’clock plants.
C^W: White.
C^R: Red.
C^RW: Pink.
4
Q
Phenotypic Ratio when the F1 is selfed >
Complete dominance:
Incomplete dominance:
Co-dominance:
A
3:1
1:2:1
1:2:1
5
Q
Missing Alleles are a result of:
A
Lethal allele.
6
Q
Manx Heterozygous:
A
One lethal allele.
Cat develops a short tail.
7
Q
Manx homozygous dominant:
A
This is lethal & the offspring dies before birth.
8
Q
Manx homozygous recessive:
A
Wild type allele.
Normal.
9
Q
Ratio when an F1 Manx is self-crossed.
A
1:2
