. The recessive gene sh produces shrunken endosperm in corn kernels and is domin
ID: 253378 • Letter: #
Question
. The recessive gene sh produces shrunken endosperm in corn kernels and is dominant allele sh+ produces full, plump kernels. The recessive gene c produces colorless endosperm and its dominant allele c+ produces colored endosperm. Two homozygous plants are crossed, producing an F1 all phenotypically plump and colored. The F1 plants are testcrossed and produce 149 shrunken colored: 4,035 shrunken colorless: 152 plump, colorless: 4,032 plump, colored (a) what were the phenotypes and genotypes of the original parent? (b) How are the genes linked in the F1?
Explanation / Answer
Answer:
Hint: Recombinant progeny are very small in number than non-recombinant progeny.
The origianl parents are as follows..
Plump, colored ( sh+ c+/ sh + c+) x Shrunken, colorless (sh c / sh c) ---Prents
sh+ c+ / sh c (plump, colored)--------------------F1
The genes are arranged in cis-configuration.
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