Tall garden peas are produced by the action of a dominant allele T, and short plants by its recessive allele. Smooth seeds are produced by a dominant allele S, and wrinkled seeds by its recessive alleles. A double heterozygous, tall, smooth garden pea was test crossed. The offspring were observed to be: 114 tall, smooth; 100 short, wrinkled, 117 tall, wrinkled, and 113 short, smooth.

(a) Determine the genotypes of the parents.

(b) Estimate the genotypes of the gametes that the parents will produce.

(c) Predict the ratio in which all the different genotypes should occur in the progeny

 (d) Predict the ratio in which all the different phenotypes should occur in the progeny.

(e)State whether the genes involved are linked or not.

(f) Test your answer in (e) above

Mendel found that, in his pea plants, Yellow seeds (Y) were dominant to green seeds (y) and Smooth seeds (S) were dominant to wrinkled (s). Considering this, and using the following phenotypic data of parents and offspring, determine the genotype for each of the parents in each example cross shown be sure to clearly distinguish between the upper case = Dominant allele and lower case = recessive allele in your answers hint: the best way to do this is first determine the possible genotypes for the parents, given their phenotypes, and then examine the phenotypic ratios of the offspring to choose the correct parent genotypes.

a. Parents: Yellow, wrinkled x Yellow, Smooth Offspring: 3/8 Yellow, Smooth 3/8 Yellow, wrinkled 1/8 green, Smooth 1/8 green, wrinkled

b. Parents: green, Smooth x Yellow, wrinkled Offspring: 1/2 green, Smooth 1/2 Yellow, Smooth

dhe position of the flowers on the stem of the pea plant is determined by a pair of alleles. Those that grow axially are produced by the action of a dominant T allele and those that only grow at the tip of the stem through the action of a recessive t allele. Purple flowers are produced by a dominant B allele and white flowers by a recessive b allele. A heterozygous plant with purple flowers and axillary leaves is crossed with a pure line of the same phenotype. What genotypic and phenotypic ratios are expected in F1 progeny?