In Cattle, Roan Coat Color (Mixed Red and White Hairs)occurs

question 73

Multiple Choice

In cattle, roan coat color (mixed red and white hairs) occurs in the heterozygous (Rr) offspring of red (RR) and white (rr) homozygotes. Which of the following crosses would produce offspring in the ratio of 1 red:2 roan:1 white?

• A) red × white
• B) roan × roan
• C) white × roan
• D) red × roan
• E) The answer cannot be determined from the information provided.

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Definitions:

Glomeromycete

Glomeromycetes are a group of fungi that form symbiotic relationships with the roots of plants, assisting in nutrient exchange through structures known as arbuscules.

Chytridiomycete

A member of a phylum of fungi characterized by the production of flagellate cells at some stage in their life history. Also called chytrid.

Cellulose

A complex carbohydrate that constitutes the primary structural component of plant cell walls.

Mechanical Suffocation

The obstruction of air flow and inability to breathe due to external mechanical forces.