2.33 Chromosomes Quiz

The part of the cell that contains chromosomes and genes is the:

• Mitochondria

• Nucleus

• Chloroplast

• Ribosomes

Answer explanation

The nucleus is the part of the cell that contains chromosomes and genes, which carry the genetic information necessary for cell function and heredity. Other options like mitochondria and chloroplasts have different roles.

Tags

NGSS.MS-LS1-2

NGSS.MS-LS3-1

A _________ is DNA tightly coiled around proteins.

• gene

• chromosome

• trait

• mutation

Answer explanation

A chromosome is a structure within cells that consists of DNA tightly coiled around proteins called histones. This organization allows for efficient packaging and regulation of genetic information.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS1-1

The number of human chromosomes is

• 23

• 46

• 92

• 64

Answer explanation

Humans have 46 chromosomes, organized into 23 pairs. Each parent contributes one chromosome to each pair, resulting in a total of 46. Therefore, the correct answer is 46.

A change in DNA or chromosomes

• Mitosis

• Meiosis

• mutation

• Osmosis

Answer explanation

A mutation refers to a change in the DNA sequence or chromosomes, which can lead to variations in traits. Mitosis and meiosis are processes of cell division, while osmosis is a movement of water, not related to DNA changes.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What are found within chromosomes?

• Karyotype

• nucleus

• genes

• traits

Answer explanation

Chromosomes contain genes, which are the units of heredity that carry information for traits. While karyotypes and nuclei are related to chromosomes, they do not reside within them. Therefore, the correct answer is genes.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS1-1

Where are chromosomes found in a cell?

• in the mitochondria

• in the cell membrane

• in the cytoplasm

• in the nucleus

Answer explanation

Chromosomes are found in the nucleus of a cell, where they store genetic information. Other options like mitochondria, cell membrane, and cytoplasm do not contain chromosomes.

Tags

NGSS.HS-LS3-1

Homologous Chromosomes are a combination of how many chromosomes from each parent?

• 1 from each parent

• 2 from each parent

• 1/2 from each parent

• 23 from each parent

Answer explanation

Homologous chromosomes consist of one chromosome from each parent, making the correct answer '1 from each parent'. This pairing is crucial for genetic diversity during reproduction.

What is an organized picture of all of an organism’s homologous chromosome pairs lined up with each other?

• DNA

• A Chromosome

• Karyotype

• Allele

Answer explanation

A karyotype is an organized profile of an organism's homologous chromosome pairs, arranged in a standard format. It allows for the examination of chromosome number and structure, making it the correct answer.

Which set of chromosomes represents a male?

• XX

• XY

• XXY

• XYY

Answer explanation

The XY chromosome set represents a male. Females typically have two X chromosomes (XX), while variations like XXY and XYY are intersex conditions. Therefore, the correct answer is XY.

How many pairs of chromosomes does everyone have?

• 46

• 16

• 8

• 23

Answer explanation

Humans have 23 pairs of chromosomes, totaling 46 individual chromosomes. Each pair consists of one chromosome from each parent, making 23 the correct answer.

Tags

NGSS.HS-LS3-1