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Description
Mind Map by GeorgeHaines, updated more than 1 year ago
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Created by GeorgeHaines
over 9 years ago
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GCSE Science - B1 - You and Your Genes
- Genes, Chromosomes and DNA
- Genes are Instructions for Cells
- Each gene is a code for making a certain protein. Proteins are the building blocks for cells..
Having different versions of proteins means that we end up with different characteristics.
- 1.
- Some proteins are structural proteins. They're part of things like
skin, hair and blood.
- Some proteins are structural proteins. They're part of things like
skin, hair and blood.
- 2.
- Other Proteins are functional proteins. For example, enzymes are
proteins that help with digestion by breaking down food molecules -
amylase is a digestive enzyme that breaks down starch
- Other Proteins are functional proteins. For example, enzymes are
proteins that help with digestion by breaking down food molecules -
amylase is a digestive enzyme that breaks down starch
- Each gene is a code for making a certain protein. Proteins are the building blocks for cells..
Having different versions of proteins means that we end up with different characteristics.
- An Organism's Genotype Describes the
Genes It's Got
- 1.
- An organism's genotype is all of the genes it has.
The characteristics that an organism displays are
called its phenotype.
- An organism's genotype is all of the genes it has.
The characteristics that an organism displays are
called its phenotype.
- 2.
- Some characteristics, e.g. dimples, are controlled only by genes. This can just be
one gene, or quite often the characteristic is controlled by several genes working
together, e.g. eye colour.
- Some characteristics, e.g. dimples, are controlled only by genes. This can just be
one gene, or quite often the characteristic is controlled by several genes working
together, e.g. eye colour.
- 3.
- Other characteristics, e.g. scars are controlled only by
environmental factors. They don't have anything to do
with genes.
- Other characteristics, e.g. scars are controlled only by
environmental factors. They don't have anything to do
with genes.
- 4.
- There are also characteristics that are controlled by both genes and
environmental factors. For example, weight - if both your parents are
skinny, you'll probably be skinny.
- There are also characteristics that are controlled by both genes and
environmental factors. For example, weight - if both your parents are
skinny, you'll probably be skinny.
- 1.
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