2.2 DNA and Meiosis

Question 0

Dna function

Answer 0

Pass hereditary material down generations

Question 1

Nucleotide

Answer 1

Base phosphate and deoxyribose sugar, joined by condensation between phosphate and sugar

Question 2

Adaptions of dna

Answer 2

Stability, size, protection

Question 3

Gene

Answer 3

Section of dna that codes for a polypeptide

Question 4

Triplet code

Answer 4

Each amino acid is 3 bases because there is 20 amino acids. Some amino acids have more than one code, some codes don’t have an acid

Question 5

Prokaryotic

Answer 5

No chromosomes

Question 6

Eukaryotic

Answer 6

Chromosomes

Question 7

Dna structure

Answer 7

Held in place with histone proteins, chromosomes coil, loop, combine to form molecules

Question 8

Homologous chromosomes

Answer 8

Determine same genetic characteristics but not same alleles, one from each parent

Question 9

Crossing over

Answer 9

Chromatids twist around each other, tension breaks sections off and they switch over

Question 10

Independent segregation

Answer 10

Random lining up of chromosomes

Question 11

Meiosis

Answer 11

Homologous pair up, separate into cells, chromatids separate into 4 haploid cells