In Labrador Retrievers, Coat Color Is Controlled by Gene Interaction

question 50

Short Answer

In Labrador retrievers, coat color is controlled by gene interaction in which homozygosity for a recessive allele can mask the phenotypic expression of a second gene. This genetic interaction is known as ___________and has a characteristic _________ ratio.

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Definitions:

Time Period

A length of time during which a sequence of events occurs, often used to identify historical or geological eras.

First Organisms

The first organisms refer to the earliest forms of life on Earth, which are believed to be simple, single-celled organisms that appeared billions of years ago.

Trilobites

Extinct marine arthropods with a hard exoskeleton, which lived between the Cambrian and Permian periods, serving as important index fossils.

K-P Boundary

The K-Pg (Cretaceous-Paleogene) Boundary marks the mass extinction event about 66 million years ago that led to the extinction of the dinosaurs and many other species.