Asked in PMC Practice Test 11 (2021) 2021

When red homozygous flower is paired with white homozygous flower then the resultant pink snapdragon is result of?

Correct answer: C. Partial dominance

  • A. Complete dominance
  • B. Codominance
  • C. Partial dominance
  • D. All of these

Explanation

Complete dominance is a form of dominance wherein the dominant allele completely masks the effect of the recessive allele in heterozygous conditions. Codominance, as it relates to genetics, refers to a type of inheritance in which two versions (alleles) of the same gene are expressed separately to yield different traits in an individual. Incomplete dominance is a form of Gene interaction in which both alleles of a gene at a locus are partially expressed, often resulting in an intermediate or different phenotype. It is also known as partial dominance. When a homozygous flower is paired with a white homozygous flower then the resulting pink Snapdragon is the result of partial dominance. In partial or incomplete dominance the phenotype of the heterozygote is intermediate between the phenotypes of the two homozygotes. This is the incorrect option.

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About Mendel's Laws of Inheritance

Mendelian inheritance explains how alleles separate into gametes and assort during reproduction, producing predictable genotype and phenotype ratios. Questions cover dominance, recessiveness, homozygous and heterozygous conditions, the laws of segregation and independent assortment, monohybrid and dihybrid crosses, test crosses and the limits caused by linked genes.

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