Offspring Parents male x female Males Females 1. light x light 2. light x buff 3

Question

Offspring Parents male x female Males Females 1. light x light 2. light x buff 3. buff x light 4. lightx ring 5. buff x buff 6. ring x ring all light ½ light, ½ buff ½ light, ½ buff all buff ½ buff, 1/4 light, 1/4 ring all ring all light ½ light, ½ buff ½ light, ½ buff all buff ½ buff, 1/4 light, 1/4 ring all ring 8. If you were to cross the male parent from family #6 with the female parent from family #3, what offspring ratio would you expect? a) all buff b) ½ light, ½ ring c)% light, ½ buff d)% buff, ½ ring e)% buff, 1/4 light, 1/4 ring 9. What is the phenomenon depicted in families 1-6 called? a) mutation b) epistasis c) variable penetrance d) variable expressivity e) incomplete dominance

Explanation / Answer

8)

AA is light, Aa is buff and aa is ring genotype

If we cross ring parent from family 6 that is aa and female parent from family 3 that is light having genotype AA. Then the offering ration will be all Aa that is buff. Option A is the correct answer.

9) The correct answer is option E that is incomplete dominance because when two trait mix it blends and make another trait.

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