Question

UUUUUU Examine the millet seeds provided in the kit. Each seed represents an individual living being. There are two seed types: 1) some seeds are round with a smooth exterior; 2) some seeds are slightly wrinkled and have pointed ends. See Figure 9. Round Wrinkled Figure 9. Millet seeds: round or wrinkled. 2 Assume the following about the millet seeds: the character for seed texture has two alleles, the round seed allele (R) and the wrinkled seed allele (r). Complete Data Table 1 by recording the appropriate genotypes and phenotypes. 3 Assume that the millet seed population in your packet had parents that were Rr and rr. Draw a Punnett square for a cross (Rr x rr) and take a photo of your drawing. Upload the image into Punnett Square 1. 4 Determine the expected phenotypic and genotypic ratio of the offspring in Punnett Square 1. Record the ratios in Data Table 2. 5 Determine the percentage of offspring expected to be round and those expected to be wrinkled. Record in Data Table 2.

Answer 1

Since the character for seed structure has two alleles , the Round seed allele (R), dominat and the wrinkled seed allele (r), recessive, the genotype and phenotype of millet seed coat texture will be

Data Table 1

GENOTYPE PHENOTYPE RR Round Rr Round rr Wrinkled

Punnet Square 1

Punnet Square obtained by the Cross between  Parents ( Rr X rr )

	r	r
R	Rr	Rr
r	rr	rr

"Rr" Heterozygous dominant represent Round Seed and "rr" homozygous recessive represent wrinkled seed.

Phenotype ratio of offspring in punnet square

Round : Wrinkled = 2:2 i.e to 1:1

Genotype ratio of offspring in punnet square

Rr : rr = 2:2 i.e 1:1

Offspring expected to be round is 50% and expected to be wrinkled is also 50% (since phenotype ratio of offspring i.e Round: Wrinkled is 1:1)

Data Table 2

Genoptype Ratio (Rr : rr)	Phenotype Ratio (Round : Wrinkled)	% of offspring to be round	% off offspring to be wrinkled
1:1	1:1	50%	50%