Mule Reproduction and Genetics

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Questions and Answers

What is the chromosomal composition of a mule?

31 chromosomes from the mother and 32 chromosomes from the father
33 chromosomes from the mother and 30 chromosomes from the father
30 chromosomes from the mother and 33 chromosomes from the father
32 chromosomes from the mother and 31 chromosomes from the father (correct)

Why are mules unable to reproduce with other mules?

Mules have a genetic trait that prevents them from reproducing with other mules
Mules have an incompatible reproductive system
The 63 chromosomes inherited from the parents cannot pair off evenly during meiosis (correct)
Mules lack the necessary hormones for reproduction

What traits contribute to making mules the best combination of both species?

Strength and intelligence from both parents in equal proportions
Speed and endurance from both parents in equal proportions
Strength from the horse and intelligence from the donkey (correct)
Speed from the horse and endurance from the donkey

What is the main purpose of outcrossing in animal breeding?

To mate animals within the same breed but with no relationship to overcome inbreeding depression (D) Signup and view all the answers

In genetics studies, what is the purpose of backcrossing?

To isolate certain characteristics in a related group of animals or plants (D) Signup and view all the answers

What is the key difference between backcrossing and linebreeding?

Backcrossing involves mating a crossbred animal with one of its parents, while linebreeding involves repeated back crossing to one outstanding ancestor (A) Signup and view all the answers

What is the purpose of linebreeding in animal breeding?

To emphasize the characteristics of an outstanding ancestor by repeated back crossing (C) Signup and view all the answers

What is the primary purpose of outcrossing in animal breeding?

To overcome the negative effects of inbreeding depression (B) Signup and view all the answers

How does backcrossing differ from linebreeding?

Backcrossing is the repeated back crossing to one outstanding ancestor, while linebreeding involves mating a crossbred animal with one of its parents (C) Signup and view all the answers