Mutations and Meiosis

What mutation has occurred here?

T-G-A-C-C-A

T-G-A-G-C-A

• Point Mutation - Missense

• Insertion Mutation- Frameshift

• Point Mutation- Nonsense

• Point Mutation- Silent

• Point Mutation- Frameshift

Tags

NGSS.HS-LS3-2

ATT-TGA-GCC- Original

ATT-GAG-CC - Mutated

The example above is an example of a

• Insertion- Frameshift

• Deletion- Substitution

• Deletion -Frameshift

• Point- Nonsense

Tags

NGSS.HS-LS3-2

Which statement correctly describes meiosis?

• cells divide only once
• meiosis does not occur in reproductive cells
• the cells produced at the end of meiosis are genetically identical to the parent cell
• The cells produced at the end of meiosis contain half the number of chromosomes as the parent cell

Tags

NGSS.HS-LS3-2

Which of the following represents chromosome # during fertilization?

• n+n=2n

• 2n+2n = 4n

• 2n=n+n

• 2n-n = n

Which of the following best explains why the chromosome number is an even number in organisms?

• It is only by coincidence, many organisms have an odd number
• The diploid number is always even so that when mitosis occurs each cell gets the same number of chromosmes
• The diploid chromosome number represents pairs of chromosomes, one from ech parent, so that it is always an even number
• Chromosomes double very time the cell divides, so after the first division, the number is always even

Tags

NGSS.HS-LS3-1

Based only on the sex chromosomes in typical human egg and sperm cells at fertilization, the probability of producing a female is

• 25%
• 50%
• 75%
• 90%

Sex cells of fruit flies contain 16 chromosomes. How many are in the body cells?

• 16 chromosomes

• 8 chromosomes

• 32 chromosomes

• 4 chromosomes

A male shark has 40 chromosomes in each of its sex cells. How many would be present in its body cells?

• 20
• 40
• 80
• 160

Tags

NGSS.HS-LS3-1

Body cells are ________________ that means they have __________________ chromosomes

• haploid; 46

• diploid; 46

• haploid; 23

The Fusion of an egg and sperm cell is called

• mitosis

• Meiosis

• fertilization