Question

Check your understanding

In dogs, black coat color (B) is dominant to yellow coat color (b), and straight
fur (C) is dominant to curly fur (c). The coat color gene and the fur texture gene
are on different chromosomes, so they assort independently, and are not sex
linked
In a cross between two BbCc parents, predict the fraction of offspring with
black coat color and straight fur.
Choose 1 answer:
1/16
9/16
15/16
Hint

Answer 1

The fraction of offspring with black coat color and straight fur is 9/16.

Step-by-step explanation:

Information given:

black coat colour and straight fur - dominant genotype BBCC, BbCc

yellow coat colour and curly fur - recessive genotype bbcc

Both the traits are independently assorted. The fur colour and fur type is not present on the same chromosome and are not sex linked.

The genotype of the parents are:

BbCc X BbCc

Punnet square shows:

BC Bc bC bc

BC BBCC BBCc BbCC BbCc

Bc BBCc BBcc BbCc Bbcc

bC BbCC BbCc bbCC bbCc

bc BbCc Bbcc bbCc bbcc

9 BLACK STRAIGHT

3 BLACK CURLY

3 YELLOW STRAIGHT

1 YELLOW CURLY

9/16 is the fraction of progeny to be black coat colour and straight fur.