Using \"R\" for the dominant allele for round seeds and \"r\" for the recessive

Question

Using "R" for the dominant allele for round seeds and "r" for the recessive allele for wrinkled seeds, determine the genotype for heterozygous round seeds. 8. 9. Make a Punnett Square for the cross of two heterozygous round seed plants. 10. List the different genotypes of the offspring. 11, what are the phenotypes for each of the genotypes in #10? 12, what percent of the plants will be each of the phektypes listed in #11? 13. If 84 plants are produced, how many will produce seeds of each phenotype?

Explanation / Answer

8.Heterozygous round seeds would be :Rr as in heterozygous condition both dominant and recessive alleles will be present.

9.Rr * Rr

10.genotypes of offsprings are:

Rr :heterozygous dominant

RR:homozygous dominant

rr: homozygous recessive

11.

Rr - Round seeds

RR-Round seeds

rr-wrinkled seeds

12.

Round seeds =3

percent of plants that are round = 3/4 *100 = 75%

Wrinkled seed = 1

percent of plants that is wrinkled =1/4*100 = 25%

13. If 84 plants are produced,then

Round seeds will be = 75% of 84 = 63

Wrinkled seeds will be =25% of 84 =21

R r R RR Rr r Rr rr

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