2. Mendel's Laws of Inheritance
Monohybrid Cross
1:24 minutes
Problem 17b
Textbook Question
Textbook QuestionIn cats, tortoiseshell coat color appears in females. A tortoiseshell coat has patches of dark brown fur and patches of orange fur that each in total cover about half the body but have a unique pattern in each female. Male cats can be either dark brown or orange, but a male cat with tortoiseshell coat is rarely produced. Two sample crosses between males and females from pure-breeding lines produced the tortoiseshell females shown.
Cross I P: dark brown male × orange female
F₁: orange males and tortoiseshell females
Cross II P: orange male × dark brown female
F₁: dark brown males and tortoiseshell females
Why are tortoiseshell cats female?
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