126526
Description
Mind Map by buttsaggington, updated more than 1 year ago
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Created by buttsaggington
over 11 years ago
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DNA and patterns of inheritance
- DNA is a molecule arranged in a double helix spiral, and is our genetic structure
- Chromosomes carry genes (pieces of information)
- Chromosomes carry genes (pieces of information)
- DNA is short for doexyribonucleic acid
- Each human cell contains about 2m of DNA strands forming a double helix
- The average human has 46 chromosomes
- Genes contain thousands of bases. They control the development of inherited characteristics such as hair colour, eye colour and nose shape etc
- They also control the production of hormones such as insulin
- They also control the production of hormones such as insulin
- Each chromosome also contains mother and father genes
- For example, if your father had blue eyes, and your mother brown, you would inherit one of these two
- Similarly, this works for blood type, being able to roll you tongue, skin colour etc
- Similarly, this works for blood type, being able to roll you tongue, skin colour etc
- For example, if your father had blue eyes, and your mother brown, you would inherit one of these two
- A normal human cell contains 23 pairs of chromosomes
- Genes are made of DNA
- Male sex chromosomes are XY
- Female sex chromosomes are XX
- Female sex chromosomes are XX
- A dominant allele will always express it's characteristic
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