Genetic cross with independent assortment (unlinked traits). Wolves are sometimes observed to have black coats and blue eyes. Assume that these traits are each determined by single genes that are located on different Also assume that normal gray coat color (G) is dominant to black (g) and brown eyes (B) are dominant to blue (b). Suppose that each parent has a normal-colored coat and brown eyes, and that both individuals are heterozygous for both traits. Use the Punnett Square below to answer the following questions: GgBb x GgBb GB Gb gB gb GB GGBB GGBb GgBB GgBb Gb GGBb GGbb GgBb Ggbb gB GgBB GgBb ggBB ggBb gb GgBb Ggbb ggBb ggbb a) From your Punnett square, how many individuals are dihybrids? b) How many individuals are both homozygous recessive for coat color and heterozygous for eye color (ggBb)? c) Fill in the blanks to state the expected phenotypic ratio of the offspring: ___ Gray coat, brown eyes : ___Gray coat, blue eyes : ___ Black coat, brown eyes : ____ Black coat, blue eyes
Genetic cross with independent assortment (unlinked traits). Wolves are sometimes observed to have black coats and blue eyes. Assume that these traits are each determined by single genes that are located on different Also assume that normal gray coat color (G) is dominant to black (g) and brown eyes (B) are dominant to blue (b). Suppose that each parent has a normal-colored coat and brown eyes, and that both individuals are heterozygous for both traits. Use the Punnett Square below to answer the following questions: GgBb x GgBb GB Gb gB gb GB GGBB GGBb GgBB GgBb Gb GGBb GGbb GgBb Ggbb gB GgBB GgBb ggBB ggBb gb GgBb Ggbb ggBb ggbb a) From your Punnett square, how many individuals are dihybrids? b) How many individuals are both homozygous recessive for coat color and heterozygous for eye color (ggBb)? c) Fill in the blanks to state the expected phenotypic ratio of the offspring: ___ Gray coat, brown eyes : ___Gray coat, blue eyes : ___ Black coat, brown eyes : ____ Black coat, blue eyes
Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN:9781305251052
Author:Michael Cummings
Publisher:Michael Cummings
Chapter3: Transmission Of Genes From Generation To Generation
Section: Chapter Questions
Problem 18QP: More Crosses with Pea Plants: The Principle of Independent Assortment Determine the possible...
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- Genetic cross with independent assortment (unlinked traits). Wolves are sometimes observed to have black coats and blue eyes. Assume that these traits are each determined by single genes that are located on different Also assume that normal gray coat color (G) is dominant to black (g) and brown eyes (B) are dominant to blue (b). Suppose that each parent has a normal-colored coat and brown eyes, and that both individuals are heterozygous for both traits. Use the Punnett Square below to answer the following questions:
GgBb x GgBb
|
GB |
Gb |
gB |
gb |
GB |
GGBB |
GGBb |
GgBB |
GgBb |
Gb |
GGBb |
GGbb |
GgBb |
Ggbb |
gB |
GgBB |
GgBb |
ggBB |
ggBb |
gb |
GgBb |
Ggbb |
ggBb |
ggbb |
- a) From your Punnett square, how many individuals are dihybrids?
- b) How many individuals are both homozygous recessive for coat color and heterozygous for eye color (ggBb)?
- c) Fill in the blanks to state the expected
phenotypic ratio of the offspring:
___ Gray coat, brown eyes : ___Gray coat, blue eyes : ___ Black coat, brown eyes : ____ Black coat, blue eyes
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