B6- Cell cycle, reproduction Flashcards
what is MEIOSIS? where does it occur?
Occurs in OVARIES + TESTEES
for GAMETES (sex cells)
where does fertilisation occur?
fallopian tube
what is asexual reproduction?
involves 1 genetically identitcle offspring, MITOSIS
examples of asexual reproduction?
spider plant, bacteria, amoeba
what is fertilisation?
fusion of gametes, 2 parent cells
where does mitosis occur?
body cells
how many divisions? how many cells creates? MITOSIS
1 division, 2 identical daughter cells
how many divisions? how many cells creates? MEIOSIS
2 divisions, 4 genetically variated cells
How many chromosomes in meiosis?
23
How many chromosomes in mitosis?
46
what is DNA?
Polymer- large molecule made up of repeating monomers (nucleotides)
what is a nucleotide? what does it contain?
building block of DNA:
Phosphate, pentose sugar, nitrogen base