Pretest

Question 1

Which statement about sister chromatids is true?

Revolt · Accepted Answer

Sister chromatids are only present during cell reproduction.

Question 2

Which term describes the chromosomal abnormality of having three copies of a single chromosome?

Revolt · Accepted Answer

trisomy

Question 3

Which is defined as a cell structure made of DNA that gives all of the master instructions for the cell?

Revolt · Accepted Answer

chromosome

Question 4

Which term describes the chromosomal abnormality of having extra chromosomes?

Revolt · Accepted Answer

polysomy

Question 5

Having the ability to roll or curl the tongue up along both sides to form a tube is a dominant trait. Which diagram represents the chromosomes in a person that does not have this ability?

Revolt · Accepted Answer

Image with description Two homologous chromosomes with lowercase h on both at the same position.

Question 6

While analyzing a karyotype, geneticists identify a missing chromosome. Which term describes this chromosomal abnormality?

Revolt · Accepted Answer

aneuploidy

Question 7

Which diagram correctly shows how heterozygous alleles are found on homologous chromosomes?

Revolt · Accepted Answer

Image with description Two homologous chromosomes with uppercase A on one and lowercase a on the other at the same position.

Question 8

How can the two chromosomes that make up a homologous pair differ?

Revolt · Accepted Answer

They can contain different alleles for the same trait.

Question 9

Which flowchart correctly lists the structures in order from smallest to largest?

Revolt · Accepted Answer

gene → DNA → chromosome → nucleus

Question 10

In cell biology, what does the word queue describe?

Revolt · Accepted Answer

the long arm of a chromosome

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