Understanding DNA and Nucleotides Quiz

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Questions and Answers

From each parent, how many chromosomes do you inherit?

23

What do we call matching pairs of chromosomes?

Homologous chromosomes

What determines whether an individual is male or female?

Sex chromosomes (X and Y)

How many sex chromosomes do females have?

<p>Two X chromosomes</p> Signup and view all the answers

How many sex chromosomes do males have?

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

Where do homologous chromosomes come from?

<p>One from each parent</p> Signup and view all the answers

What is the structure that homologous chromosomes have in the same position?

<p>Centromere</p> Signup and view all the answers

What do homologous chromosomes have at the same location along their length?

<p>Genes for particular characteristics</p> Signup and view all the answers

From which parent does a baby boy inherit its Y chromosome?

<p>Male parent</p> Signup and view all the answers

What syndrome is shown in a karyotype with three copies of chromosome #21?

<p>Down Syndrome</p> Signup and view all the answers

Flashcards

How many chromosomes from each parent?

23 chromosomes are inherited from each parent.

Matching chromosome pairs?

Matching pairs of chromosomes are called homologous chromosomes.

What determines sex?

Sex chromosomes (X and Y) determine whether an individual is male or female.

Female sex chromosomes?

Females have two X chromosomes.

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Male sex chromosomes?

Males have one X and one Y chromosome.

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Origin of homologous pairs?

Homologous chromosomes come one from each parent.

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Centromere position?

Homologous chromosomes have centromeres in the same position.

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Gene location on homologs?

Homologous chromosomes have genes for particular characteristics at the same location.

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Y chromosome inheritance?

A baby boy inherits its Y chromosome from its male parent.

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Trisomy 21?

A karyotype with three copies of chromosome #21 indicates Down Syndrome.

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