Hair length of the fur in cats can be either short or long. The allele for short hair is dominant to that of long hair, and is transmitted in normal Mendelian fashion. One of several genes involved with cat coat colour has two alleles, black and ginger, which are associated with sex-linkage on the X chromosome. Three types of phenotypes are seen in females, black, ginger, and tortoise shell (a mixture of ginger and black fur), whilst male cats only exhibit two fur colours with this gene, namely ginger or black. In cats females are the homogametic sex. a) What does homogametic mean in this context? b) Produce a key to clearly show the nature of the alleles associated with the length of cat fur, and in each case justify your choice of letters and / or style of presentation to best depict the genetics involved. c) State the type of relationship shown between the black allele and the ginger allele for the gene given in terms of cat fur colour, justifying your answer with the evidence from the question details given. d) Produce a key to clearly show the nature of the genetics associated with the colour of cat fur for the gene given, and in each case justify your choice of letters and / or style of presentation to best depict the genetics involved.

Name: Hair length of the fur in cats can be either short or long. The allele
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Description: Hair length of the fur in cats can be either short or long. The allele for short hair is dominant to that of long hair, and is transmitted in normal Mendelian fashion. One of several genes involved with cat coat colour has two alleles, black and ging

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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Hair length of the fur in cats can be either short or long. The allele for short hair is dominant to that of long hair, and is transmitted in normal Mendelian fashion.

One of several genes involved with cat coat colour has two alleles, black and ginger, which are associated with sex-linkage on the X chromosome. Three types of phenotypes are seen in females, black, ginger, and tortoise shell (a mixture of ginger and black fur), whilst male cats only exhibit two fur colours with this gene, namely ginger or black. In cats females are the homogametic sex.

a) What does homogametic mean in this context?

b) Produce a key to clearly show the nature of the alleles associated with the length of cat fur, and in each case justify your choice of letters and / or style of presentation to best depict the genetics involved.

c) State the type of relationship shown between the black allele and the ginger allele for the gene given in terms of cat fur colour, justifying your answer with the evidence from the question details given.

d) Produce a key to clearly show the nature of the genetics associated with the colour of cat fur for the gene given, and in each case justify your choice of letters and / or style of presentation to best depict the genetics involved.

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