Complete a Punnett square to show the genotypes and phenotypes expected for the

Question

Complete a Punnett square to show the genotypes and phenotypes expected for the following cross: heterozygous tall x heterozygous tall In humans, the gene for brown eyes (b) is dominant to the gene for blue eyes and the gene for right handedness (r) is dominant to the gene for left handedness. Two individuals heterozygous for both of these characteristics marry. Complete a Punnett square to show the expected genotypes and phenotypes of the offspring. Summarize the ratio of the phenotypes In chimpanzees, straight fingers are dominant to bent fingers. Complete a Punnett square to show the genotypes and phenotypes expected for the following cross: heterozygous straight x homozygous bent In four o'clock flowers, red plants are homozygous for the allele (R) of the gene for flower color. Plants with white flowers are homozygous for the (r) allele of the same gene. Plants with pink flowers are are heterozygous for these two alleles. Complete a Punnett square to show genotypes and phenotypes that are expected when plants with pink flowers are intercrossed.

Explanation / Answer

Tt

Tt

parent generation= Heterozygous tall (Tt) x Heterozygous tall (Tt)

gametes T and t T and t

Phenotype ratio= 3 tall: 1 dwarf
Genotype ratio= 1 TT : 2Tt: 1 tt

Tt

Tt

T t T TT (tall) Tt (tall) t Tt (tall) tt (dwarf)

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