Chromosomes - IB Bio - 3.2

How many pairs of chromosomes are in your cells?

• 23

• 46

• 13

• 42

A Goat has 60 chromosomes in its somatic cells. What is the haploid number?

• 60

• 30

• 34

• 120

A dog has 78 chromosomes in its body cells. What is the diploid number?

• 78

• 39

• 156

• 34

Gametes have haploid or diploid number of chromosomes?

• Haploid
• Diploid

Tags

NGSS.HS-LS3-2

Diploid

• A cell that has 2 kinds of each chromosome type, symbolized by 46n

• A cell that has 1 kind of each chromosome type, symbolized by n

• A cell that has 2 kinds of each chromosome type, symbolized by 2n

• A cell that has 1 kind of each chromosome type, symbolized by 23n

Haploid

• A cell that has 2 kinds of each chromosome type, symbolized by 46n

• A cell that has 1 kind of each chromosome type, symbolized by n

• A cell that has 2 kinds of each chromosome type, symbolized by 2n

• A cell that has 1 kind of each chromosome type, symbolized by 23n

Homologous chromosome

• 2 chromosomes with different genes but matching alleles

• 2 chromosomes with different genes and possible different alleles

• 2 chromosomes with matching genes and always matching alleles

• 2 chromosomes with matching genes but possible different alleles

The number of human chromosomes is

• 23

• 46

• 92

• 64

Tags

NGSS.MS-LS3-1

Why do chromosomes all have a homologous pair?

• Because DNA doubles during DNA Replication

• Because you get one from your mom and one from your dad

• Because pairs can divide easier

• Because DNA is awesome

A chromosome is best described as a

• gene that has more than one form.
  
• green cell found in many plants.
  
• strand of DNA containing genetic information.
  
• reproductive cell found in certain kinds of bacteria

Tags

NGSS.HS-LS3-1