There are two types of cell division. Mitosis produces two identical diploid daughter cells. Meiosis produces four non-identical haploid gametes (sex cells).
Which of these statements is true of genes?
A gene is a short section of DNA that codes for a protein
A gene is a single molecule of DNA
Humans have 46 genes
How many chromosomes does a human have in each body cell?
Which of these statements is correct about the cells produced by mitosis?
Two daughter cells are produced - each has the same number of chromosomes as the parent cells
Four daughter cells are produced - each has the same number of chromosomes as the parent cells
Two daughter cells are produced - each has half the number of chromosomes as the parent cells
What happens in the stage that is before mitosis in the cell cycle?
A period of DNA synthesis
The cytoplasm separates
A period of growth, during which time DNA is checked for errors
Which of these statements about stem cells is incorrect?
Embryonic stem cells can differentiate into more different cell types
Adult stem cells are limited to the bone marrow in adults
Bone marrow transplants use embryonic stem cells
Which of these descriptions best defines a genome?
An x-shaped length of DNA which contains many genes
Either an A and T, or a G and C
One copy of an organism's DNA
How many chromosomes are there in a haploid human cell?
Which term best describes daughter cells in mitosis?
How many daughter cells are produced in mitosis?
Which of these is not a type of cell division?