Black rabbit fur used to be desired for winter coats and sold for a higher price than white rabbit fur. A breeder has just purchased a black rabbit. Black fur is dominant to white fur. Before she starts breeding for profit, a test cross needs to be done. Which rabbit should the breeder cross with her black rabbit?

White W

Black w

Long ears: L

Short ears: l

Rabbits heterozygous: WwLl

The cross: The cross between WwLl vs WwLl

Genotype:

WWLL 1/16

WWLl  2/16

WwLL 2/16

WwLl 4/16

WWll 1/16

Wwll 2/16

wwLL 1/16

wwLl 2/16

wwll 1/16

Phenotype:

White and long ears 9/16

White and short ears 3/16

Black and long ears 3/16

Black and short ears 1/16

Explanation:

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.