Genetics and Chromosomal Abnormalities Quiz

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What is the result of nondisjunction during meiosis?

Mitosis

Chromosomal abnormalities (correct)

Increased fertility

Genetic variation

In species where males are the heterogametic sex, what type of gametes do they produce?

Unlike gametes (correct)

Only Y chromosomes

Only X chromosomes

Identical gametes

What is the characteristic karyotype of Klinefelter syndrome?

45,X

46,XY

46,XX

47,XXY (correct)

Which of the following is a characteristic of Turner syndrome?

Short stature Signup and view all the answers

What is the notation used when female is the heterogametic sex?

ZZ/ZW Signup and view all the answers

In a person with Turner syndrome who has a 45,X karyotype, in which parent did the nondisjunction occur?

Father during meiosis I Signup and view all the answers

What is the purpose of X-inactivation in females?

To ensure equal gene expression between males and females Signup and view all the answers

Which of the following is NOT a determinant of sex in Drosophila and C. elegans?

Y chromosome Signup and view all the answers

What is the term for the inactivated X chromosome in the nucleus of a female cell?

Barr body Signup and view all the answers

What is the role of the X-inactivation center (Xic) in females?

It controls the inactivation of one X chromosome Signup and view all the answers

What is the result of nondisjunction of sex chromosomes in a female?

A female with 47,XXX karyotype Signup and view all the answers

What is the main function of the SRY gene in sex determination?

To trigger the development of male characteristics Signup and view all the answers

What is the characteristic of the MSY region of the Y chromosome?

It makes up 5% of the Y chromosome Signup and view all the answers

What would be the phenotypic sex of an individual with XXY karyotype and a nonsense mutation in the SRY gene?

Female Signup and view all the answers

What is the characteristic of a female with Turner syndrome?

45,XO karyotype Signup and view all the answers

Genetics and Chromosomal Abnormalities Quiz

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