Genotype ratios Flashcards

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1
Q

9:3:3:1

A

dihybrid cross with complete dominance

9: A-;B- : 3 A-;bb : 3 aa;B- 1:aa;bb

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2
Q

9:3:4

A

recessive epistasis
9A-;B- 3:A-;bb 4 aa;Bb or bb(1x)
-if you have aa masks whatever is on the B/b locus

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3
Q

12:3:1

A

dominant epistasis
12A-;- 3aa;B- 1aa;bb
12x having one A one phenotype will mask the phenotype on the b/B locus,
-3x when no A but have B another phenotype
-1x homozygous recessive: another phenotype

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4
Q

9:7

A

9x having both A and B= one phenotype

7x everything else another phenotype

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5
Q

9:6:1

A

anything with both A and B= one phenotype
anything with just A or just B= one phenotype
aa;bb= another phenotype

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6
Q

15:1

A

15x: any genotype with either A or B or both= one phenotype
1x: aa;bb = another phenotype

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7
Q

13:3

A

combination of dominant epistasis
12x- when A then masks B
3x- when B without A
1x- aa;bb but looks like if it had the A so phenotypically count with the 12= 13x

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