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A Testcross Is Performed on an Individual to Examine Three

question 20

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A testcross is performed on an individual to examine three linked genes. The most frequent phenotypes of the progeny were Abc and aBC, and the least frequent phenotypes were abc and ABC. What was the genotype of the heterozygous individual that is test-crossed with the correct order of the three genes?


Definitions:

Teratogens

Agents or factors that can cause congenital abnormalities or increase the incidence of an anomaly in a fetus when a mother is exposed during pregnancy.

Embryo

An early stage in development of a multicellular organism following fertilization and before becoming a fetus.

Structural Development

The process of growth or evolution in the organizational or physical structure of something, which can be applied to various fields such as biology, economics, or architecture.

Brain

The organ in the head of animals, including humans, that controls functions, movements, sensations, and thoughts.

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