You either do not have a Javascript capable browser, or have Javascript turned off. Please either upgrade to Netscape 4, Internet Explorer 4 or higher, or turn Javascript back on if you already have one of these.

Introductory Animal Genetics
Animal Science 221

Epistasis: Recessive Epistatic Genotype

In cats, a sex-linked locus produces black, orange, or tortoiseshell phenotypes.

femalesXTXTBlack
XTXtTortoiseshell
XtXtOrange
malesXTYBlack
XtYOrange

Also, albinoism is caused by a recessive allele at the C locus.

C-Full color
ccAlbino

What is the progeny phenotypic ratio expected from the matings:

Choose a mating:

XTXTCc x XtYcc

XTXtcc x XtYCc

XtXtCc x XTYCc
  Black Female
  Tortoiseshell Female
  Orange Female
  Albino Female
  Black Male
  Orange Male
  Albino Male



Return to: Animal Science 221

Home page: Animal Science at Cornell University


For problems or comments on this web page, contact the Animal Science Webmaster