Meiosis+Protein Synthesis

Question 1

Describe Meiosis

Answer 1

Meiosis: Cell division that halves the number of chromosomes when forming reproductive cells.

Question 2

What are the stages of meiosis 1?

Answer 2

Prophase 1- chromosomes condense and nuclear envelope breaks down
Metaphase 1- Chromosomes line up at equator
Anaphase 1- pairs are pulled to poles but stay together
Telephase 1- pairs gather at poles and cytokinins divides the cell

Question 3

What are the stages of Meiosis 2?

Answer 3

Prophase 2- Spindle fibers form around chromosomes
Métaphase 2- Chromosomes line up at equator
Anaphase 2- centromeres divide and chromosomes are pulled apart
Telephase 2- Nuclear envelope develops around each set of chromosomes

Question 4

What are diploid and haploid cells?

Answer 4

Diploid: has 2 complete sets of chromosomes
Haploid: has 1 single set of chromosomes

Question 5

7. When during Meiosis do you have crossing over?

Answer 5

Prophase 1

Question 6

How are mitosis and meiosis different?

Answer 6

• in meiosis steps are repeated twice
• Mitosis produced diploid cells Meiosis haploid cells are produced
• mitosis=cell reproduction meiosis=sex cell reproduction

Question 7

How does the DNA make its way around the cell to make proteins?

Answer 7

mRNA leaves the nucleus
mRNA+ribosomes attach to eachother
tRNA transports amino acids to the ribosome
Anticodon of tRNA pairs with codon in mRNA
2nd tRNA comes in and pairs with next codon the 2 amino acids from a peptide bond between the amino acids
Amino acids is shaped into protein ( shows function)