Biology: You and your genes
- Created by: Paige
- Created on: 04-01-13 13:56
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- Biology- You and your genes.
- Genes
- Genes are found in our chromosomes
- These alleles may be the same (homozygous) on each pair of chromosomes, or different (heterozygous),
- which parents pass on in their sex cells in reproduction
- Different versions of the same gene are called alleles: Hair colours, eye colours, cystic fibrosis
- nucleus controls the activities of a cell
- Chromosomes are structures found in the nucleus of most cells: DNA
- A section of DNA that has the genetic code for making a particular protein: GENE
- Individuals differ in all sorts of ways: VARIATION diet, climate, culture, physical accidents, lifestyle
- Genes are found in our chromosomes
- Inheritance
- Human body cells each contain 23 pairs of chromosomes. pair of chromosomes carry the same genes in the same place
- male sex cells are called sperm
- When sex cells form, the pairs of sex chromosomes (** and XY) are separated
- females carry **, males XY
- The Y chromosome carries a gene called the ‘sex-determining region Y’ : develop in an XY embryo
- produce androgens: male sex hormones. Androgens cause the embryo to become a male: without them, the embryo develops into a female.
- Human body cells each contain 23 pairs of chromosomes. pair of chromosomes carry the same genes in the same place
- Genes
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