Question

Q4. Perform a cross between a pea plant which is heterozygous tall and homozygous yellow with
another which is homozygous tall and heterozygous yellow. State the genotypic and phenotypic
ratio.
3​

Answer 1

Answer:

• DD is homozygous dominant, gives phenotype tall. Dd is heterozygous, also gives the phenotype tall.
• In a monohybrid cross between two heterozygous parents,what would be the expected genotype and phenotype ratio? The Genotype would be 3/4 will have the dominant trait and 1/4 recessive. The Phenotype will be 3-1 Dominant. ... heterozygous genotypes are those that feature non-identical alleles for a given pair of genes.
• The expected genotype ratio when two heterozygotes are crossed is 1 (homozygous dominant) : 2 (heterozygous) : 1 (homozygous recessive). When a phenotypic ratio of 2 : 1 is observed, there is probably a lethal allele.