Topic 13 pt 2: Gene Interaction Flashcards

1
Q

Types of epistasis

A

Recessive epistasis
Dominant epistasis
Duplicate recessive epistasis
Duplicate dominant epistasis

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2
Q

Ratios for F2 in types of epistasis

A

Rec epi = 9:3:4
Dom epi = 12:3:1
Dup rec epi = 9:7
Dup dom epi = 15:1

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3
Q

Example of recessive epistasis (explain), ratio in F2

A

Labrador retriever coat colour, “ee” is epistatic over the B locus (determines black or brown)
9:3:4

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4
Q

Example of dominant epistasis (explain), ratio in F2

A

Colour in squash, big W leads to white colour in all cases)
12:3:1

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5
Q

Example of duplicate recessive epistasis (explain), ratio in F2

A

Snail pigmentation, having either aa OR bb leads to albino snail
9:7

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6
Q

Example of duplicate dominant epistasis (explain), ratio in F2

A

Locus T in capsella bursa-pastoris, having large T or V will lead to heart shape
15:1

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7
Q

Look at all slides and examples at end!!

A

Important

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