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QUESTION 6 The agouti gene in mice plays a role in determining coat colour. At this locus (a term for a gene), the genotype aa produces an agouti coat colour (a greyish colour) and the heterozygote Aa produces a yellow coat colour. The AA homozygotes, however, die very early in development - the yellow coat colour allele is a lethal allele when homozygous (clearly the encoded protein has functions other than simply coat colour). What is the expected phenotypic ratio of live mice resulting from a cross of two Aa mice? (Cross: Aa x Aa) OA. 3:1 agouti:yellow OB. 3:1 yellow:agouti OC. 2:1 agouti:yellow OD.2:1 yellow:agouti

QUESTION 6 The agouti gene in mice plays a role in determining coat colour. At this locus (a term for a gene), the genotype aa produces an agouti coat colour (a greyish colour) and the heterozygote Aa produces a yellow coat colour. The AA homozygotes, however, die very early in development - the yellow coat colour allele is a lethal allele when homozygous (clearly the encoded protein has functions other than simply coat colour). What is the expected phenotypic ratio of live mice resulting from a cross of two Aa mice? (Cross: Aa x Aa) OA. 3:1 agouti:yellow OB. 3:1 yellow:agouti OC. 2:1 agouti:yellow OD.2:1 yellow:agouti

Human Anatomy & Physiology (11th Edition)
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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QUESTION 6 The agouti gene in mice plays a role in determining coat colour. At this locus (a term for a gene), the genotype aa produces an agouti coat colour (a greyish colour) and the heterozygote Aa produces a yellow coat colour. The AA homozygotes, however, die very early in development - the yellow coat colour allele is a lethal allele when homozygous (clearly the encoded protein has functions other than simply coat colour). What is the expected phenotypic ratio of live mice resulting from a cross of two Aa mice? (Cross: Aa x Aa) OA. 3:1 agouti:yellow B. 3:1 yellow:agouti OC. 2:1 agouti:yellow D. 2:1 yellow:agouti OE. 1:1 yellow:agouti
Transcribed Image Text:QUESTION 6 The agouti gene in mice plays a role in determining coat colour. At this locus (a term for a gene), the genotype aa produces an agouti coat colour (a greyish colour) and the heterozygote Aa produces a yellow coat colour. The AA homozygotes, however, die very early in development - the yellow coat colour allele is a lethal allele when homozygous (clearly the encoded protein has functions other than simply coat colour). What is the expected phenotypic ratio of live mice resulting from a cross of two Aa mice? (Cross: Aa x Aa) OA. 3:1 agouti:yellow B. 3:1 yellow:agouti OC. 2:1 agouti:yellow D. 2:1 yellow:agouti OE. 1:1 yellow:agouti
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