In garden pea plants (*Pisum sativum*), the allele for round seed shape () is completely dominant over the allele for wrinkled seed shape (). Match each parental cross in the left column with its corresponding expected offspring phenotypic or genotypic ratio in the right column.
- Heterozygous round () Heterozygous round () phenotypic ratio ( genotypic ratio)
- Heterozygous round () Homozygous recessive wrinkled () phenotypic ratio ( genotypic ratio)
- Homozygous dominant round () Homozygous recessive wrinkled () round phenotype ( heterozygous genotypic outcome)
- Homozygous dominant round () Heterozygous round () round phenotype ( genotypic ratio)
Answer
Heterozygous cross () yields a phenotypic ratio (). Monohybrid test cross () yields a phenotypic ratio (). Pure-breeding dominant cross with recessive () yields heterozygous round (). Dominant homozygous cross with heterozygote () yields round phenotype with a genotypic ratio.
Each parental monohybrid cross produces a characteristic distribution of alleles according to Mendel's Law of Segregation. Two heterozygous parents () yield phenotypic and genotypic ratios. A test cross () yields a ratio. A cross between pure lines () yields uniform heterozygous dominant offspring (). A cross between homozygous dominant and heterozygous parents () yields a genotypic ratio of , with exhibiting the dominant phenotype.
Step-by-Step Solution
Key Concept
Mendel's First Law (Law of Segregation) and Monohybrid Inheritance Ratios
Estimated Time:2m 0s