Answered: Brindle coloration is a black and brown…

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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Hi, I'm having some trouble with this practice problem from my study guide. If anyone can explain it it would be very helpful!

Brindle coloration is a black and brown striping pattern in some dogs. This fur coloration is controlled by different alleles at a single autosomal locus. There are three alleles, K^B, k^br and k^y. The K^B allele is dominant over the other two alleles and produces a solid black color. The allele k^br produces the brindle color pattern and is dominant over the k^y allele, which produces yellow fur. Give the genotypes of the parents and offspring in each cross.

P: black X yellow; F₁: ½ brindle and ½ black
P: black X brindle; F₁: ½ black, ¼ brindle and ¼ yellow
P: brindle X yellow; F₁: 100% brindle

Expert Solution

Step 1

Three alleles

K^B,
k^br
k^y

K^B- dominant over the other two alleles which gives a solid black color.

k^br- the brindle color pattern and is dominant over the ky allele.

k^y allele - yellow fur.

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