A(n)_____ cross yields a genotypic ratio of 1:2:1 and a phenotypic ratio of 3:1.
A)allelic
B)monohybrid
C)test
D)dihybrid

Question

Quizplus · Accepted Answer

A monohybrid cross involves the inheritance of one trait governed by one gene with two alleles. When two heterozygous individuals (Aa x Aa) are crossed, the genotypic ratio of the offspring is 1 AA : 2 Aa : 1 aa, which is a 1:2:1 ratio. The phenotypic ratio is 3 dominant (AA or Aa) : 1 recessive (aa), which is a 3:1 ratio. Therefore, option B is the best choice for the given scenario.

A(n)_____ Cross Yields a Genotypic Ratio of 1:2:1 and a Phenotypic