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Analyze a cross and identify non-Mendelian pattern of inheritance in non-allelic genes (normal interaction vs epistasis) Hair color is determined in Labrador retrievers by alleles at the B and E loci. dominant allele B encodes black pigment, whereas a recessive allele b encodes brown pigment. Alleles at a second locus affect the deposition of the pigment in the shaft of the hair; dominant allele E allows dark pigment (black or brown) to be deposited, whereas recessive allele e prevents the deposition of dark pigment, causing the hair to be yellow. What type of gene interaction does this represent?

Analyze a cross and identify non-Mendelian pattern of inheritance in non-allelic genes (normal interaction vs epistasis) Hair color is determined in Labrador retrievers by alleles at the B and E loci. dominant allele B encodes black pigment, whereas a recessive allele b encodes brown pigment. Alleles at a second locus affect the deposition of the pigment in the shaft of the hair; dominant allele E allows dark pigment (black or brown) to be deposited, whereas recessive allele e prevents the deposition of dark pigment, causing the hair to be yellow. What type of gene interaction does this represent?

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
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a)recessive epistasis b)duplicate recessive epistasis c)normal non-allelic gene interaction d)normal allelic gene interaction
**Analyzing Non-Mendelian Patterns of Inheritance: Epistasis vs. Normal Interaction** **Hair Color Inheritance in Labrador Retrievers** In Labrador retrievers, hair color is influenced by alleles at two loci, B and E. - The **B locus** involves alleles that determine the pigment color: - Dominant allele **B** encodes black pigment. - Recessive allele **b** encodes brown pigment. - The **E locus** involves alleles that affect pigment deposition: - Dominant allele **E** allows the deposition of dark pigment (black or brown). - Recessive allele **e** prevents the deposition of dark pigment, resulting in yellow hair. This interaction between the B and E loci represents a type of gene interaction known as **epistasis**, where one gene (E locus) masks or modifies the expression of another gene (B locus).
Transcribed Image Text:**Analyzing Non-Mendelian Patterns of Inheritance: Epistasis vs. Normal Interaction** **Hair Color Inheritance in Labrador Retrievers** In Labrador retrievers, hair color is influenced by alleles at two loci, B and E. - The **B locus** involves alleles that determine the pigment color: - Dominant allele **B** encodes black pigment. - Recessive allele **b** encodes brown pigment. - The **E locus** involves alleles that affect pigment deposition: - Dominant allele **E** allows the deposition of dark pigment (black or brown). - Recessive allele **e** prevents the deposition of dark pigment, resulting in yellow hair. This interaction between the B and E loci represents a type of gene interaction known as **epistasis**, where one gene (E locus) masks or modifies the expression of another gene (B locus).
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