Horse coat color is controlled by many genes, including extension and cream. The extensions gene, E, determines pigment col E-, representing either Ee or EE, produces a bay coat, and ee produces a red coat. The cream gene, Cr, is incomplete dominan and functions by decreasing the intensity of the E color phenotype. The crcr genotype does not alter the red or bay phenotype. However, the Crcr genotype changes red into palomino and bay into buckskin. This is called a single dilute. The CrCr genotyp alters red into cremello and bay into perlino. This is called a double dilute. Suppose two buckskin horses, each with the Ee Crcr genotype, are crossed. Use the forked-line (branched diagram) method to determine the proportion of each phenotype and each genotype in the next generation. Each proportion may be used more than once or not at all. Ee Crcr X Ee Crcr 3/8 3/4 1/16 E-Bay ee Red 1/2 Answer Bank 9/16 crcr Crcr CrCr crcr Crcr CrCr 1/4 3/16 Bay Buckskin Perlino Red Palomino Cremello 1/8
Horse coat color is controlled by many genes, including extension and cream. The extensions gene, E, determines pigment col E-, representing either Ee or EE, produces a bay coat, and ee produces a red coat. The cream gene, Cr, is incomplete dominan and functions by decreasing the intensity of the E color phenotype. The crcr genotype does not alter the red or bay phenotype. However, the Crcr genotype changes red into palomino and bay into buckskin. This is called a single dilute. The CrCr genotyp alters red into cremello and bay into perlino. This is called a double dilute. Suppose two buckskin horses, each with the Ee Crcr genotype, are crossed. Use the forked-line (branched diagram) method to determine the proportion of each phenotype and each genotype in the next generation. Each proportion may be used more than once or not at all. Ee Crcr X Ee Crcr 3/8 3/4 1/16 E-Bay ee Red 1/2 Answer Bank 9/16 crcr Crcr CrCr crcr Crcr CrCr 1/4 3/16 Bay Buckskin Perlino Red Palomino Cremello 1/8
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:Horse coat color is controlled by many genes, including extension and cream. The extensions gene, E, determines pigment color.
E-, representing either Ee or EE, produces a bay coat, and ee produces a red coat. The cream gene, Cr, is incomplete dominant
and functions by decreasing the intensity of the E color phenotype. The crcr genotype does not alter the red or bay phenotype.
However, the Crcr genotype changes red into palomino and bay into buckskin. This is called a single dilute. The CrCr genotype
alters red into cremello and bay into perlino. This is called a double dilute.
Suppose two buckskin horses, each with the Ee Crcr genotype, are crossed. Use the forked-line (branched diagram) method to
determine the proportion of each phenotype and each genotype in the next generation. Each proportion may be used more than
once or not at all.
Ee Crcr
X
Ee Crcr
3/8
3/4
1/16
E-Bay
ee Red
1/2
Answer Bank
9/16
crcr
Crcr
CrCr
crcr
Crcr
CrCr
1/4
O
C Buckskin
Bay
3/16
Perlino
Red
TH
Palomino
Cremello
1/8
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