CK12: Genetics 3.9 Human Chromosomes

Each species has a certain number of _______.

• Gene
• DNA
• Chromosomes
• Cell
• 20

Chromosomes are coiled structures of _____ and proteins.

• DNA
• RNA
• Protiens
• Lipids
• 20

Humans have ____ pairs of chromosomes.

• 1
• 23
• 46
• 100
• 20

Tags

NGSS.HS-LS3-1

Humans have ____ chromosomes (unpaired).

• 1
• 23
• 46
• 100
• 20

Humans have ____ pair of chromosomes to determine the sex.

• 1
• 23
• 46
• 100
• 20

The 22 pairs of chromosomes that do not determine the sex are called _____.

• Autosomal
• Egg
• Gametes
• Sperm
• 20

The two sex chromosomes are ___ and ___.

• X and X
• Y and Y
• X and Y
• 20

Males have ___ and ___ chromosomes .

• X and X
• Y and Y
• X and Y
• 20

Females have 2 ____ chromosomes.

• X
• Y
• XY
• 20

Without a Y chromosome, an individual develops into a ______.

• Female
• Male
• 20