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Q4. Perform a cross between a pea plant which is heterozygous tall and homozygous yellow withanother which is homozygous tall and heterozygous yellow. State the genotypic and phenotypicratio.3​

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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.


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