Sunday, May 16, 2010

Answer these questions?

Color-blindness is due to a sex-linked recessive gene. A colorblind man marries a normal-visioned woman whose father is colorblind.





6. We know this colorblind man received the gene from:





a) his father; b) his mother; c) both his mother and father; d) either his father or mother; e) mutant sperm.








7. What percentage of their daughters would be colorblind?





a) 0%; b) 1/4; c) 1/2; d) 3/4; e) 100%





How many unique gametes could be produced through independent assortment by an individual with the genotype Aa Bb CC Dd EE?





a) 4; b) 8; c) 16; d) 32; e) 1/64.





In snapdragons, heterozygotes have pink flower, whereas homozygotes have either red or white (recessive) flowers. When plants with red flowers are crossed with plant with white flowers, what proportion of the offspring will have pink flowers?





a) zero; b) 25%; c) 50%; d) 75%; e) 100%

Answer these questions?
6. His mother


7. 1/2


8. 8 gametes


9.50%
Reply:6. His Mother


7. 1/2


8. 8


9. 100% (it won't be 50% because you are crossing two homozygotes; thus, you will have allele R from red and allele r from white flower. When they come together, you will get Rr which is pink).


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