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Genetics: Chromosomes and Inheritance

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Questions and Answers

What are the two types of chromosomes classified based on their function?

Autosomes and mitochondrial chromosomes

Dominant chromosomes and recessive chromosomes

Autosomes and sex chromosomes (correct)

Sex chromosomes and autosomal chromosomes

How many pairs of autosomal chromosomes do humans have?

22 pairs

24 pairs

23 pairs (correct)

25 pairs

What is the chance of inheritance of an abnormal dominant gene from one parent?

50% for an affected child and 50% for a non-affected child (correct)

100% for an affected child

75% for an affected child and 25% for a non-affected child

25% for an affected child and 75% for a non-affected child

Which type of chromosomes determine the sex of an individual?

<p>Sex chromosomes</p> Signup and view all the answers

How many chromosomes do males have in their sex chromosomes?

<p>One X and one Y</p> Signup and view all the answers

Study Notes

Chromosomes and Inheritance

Autosomes: non-sex chromosomes that come in pairs (1-22)
Sex chromosomes: determine the sex of an individual, consisting of X and Y chromosomes

Autosomal and Sex Chromosomes

Autosomal chromosomes: 23 pairs, totaling 46 chromosomes
Sex chromosomes: one pair, consisting of X and Y

Dominant Inheritance

A single abnormal gene from one parent is enough to cause disease
Chance of inheritance: 50% for an affected child, 50% for a non-affected child if one parent carries the gene

X-Linked Recessive Inheritance

Males have only one X chromosome, which is defective and can cause disease
Chance of inheritance: dependent on the X chromosome, but specifics not provided

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Description

Learn about the classification of chromosomes, autosomes and sex chromosomes, and the probability of inheriting certain traits or diseases. This quiz covers the basics of genetics and inheritance.