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Anonymous Annonn
wrote...
2 years ago Edited: 2 years ago
In tomatoes, dwarf (d) is recessive to tall (D) and opaque (light-green) leaves are recessive to green leaves (Op). The loci that determine height and leaf color are linked and separated by a distance of 7 cM.




Determine the phenotypes and proportions of progeny produced in the cross below. Show your work and explain your answer.


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Anonymous
wrote...
2 years ago
D op / d Op x d op / d op --- Parents

D op / d Op genotype produces 4 types of gametes as below:

Recombinant gametes (7%):

D Op = 3.5%

d op = 3.5%

Non-recombinant gametes (93%):

D op = 46.5%

d Op = 46.5%

d op / d op genotype produces only one type of gametes, op.

So, the proportion of each phenotype is determined by the gametes produced by the heterozygote, D op / d Op.

So, the ecpted phenotypes are as below:

D Op / d op = Tall, green = 3.5%

d op / d op = dwarf, opaque = 3.5%

D op / d op = Tall, opaque = 41.5%

d Op / d op = dwarf, ngree = 41.5%
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