Biology - B1
All of B1 scaled down - if you can upscale it you're set for this module - just 6 more to go!
- Created by: Snowstorm
- Created on: 14-04-14 14:17
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- Biology - B1
- Genes, Chromosomes and DNA
- Genes are instructions for cells
- Genes are code for making protein. Different versions of proteins make different characteristics.
- 2 types of protein; structural and functional
- Genotpe describes the genes an organism has.
- A gene is a short length of a chromosome.
- Genes are instructions for cells
- Genes and variation
- Sperm and egg cells have half the normal amount of DNA
- Children resemble both parents but are identical to neither
- Genes are random in sperm and eggs
- Inheritance
- Combination of alleles determines the phenotype
- Homozygous = 2 alleles the same. example, FF
- Heterozygous = 2 different alleles. example, Ff
- Sex Chromosomes
- the 23rd pair of chromosomes control whether you're male or female.
- ** = Female
- XY = Male
- Sperms have either X or Y
- All eggs are X
- Genetic Disorders
- Cystic fibrosis
- Recessive
- Carriers
- Recessive
- Huntington's
- Dominant
- No cure
- Cystic fibrosis
- Recessive
- Carriers
- Recessive
- Cystic fibrosis
- Cystic fibrosis
- Genetic Testing
- Ethics
- Not 100% accurate
- Miscarriage chance
- Abortion
- Should people with genetic disorders have kids?
- "Abortion always wrong" according to some
- IVF (In Vitro Fertilisation)
- Can see before implantation which fertilised eggs have faulty alleles
- Ethics
- Clones
- Genetically identicle
- Twins
- Embryo splits
- Asexual reproduction
- Plants
- Feeders and bulbs
- Bacteria
- Some animals
- Eggs - identical females
- Plants
- Stem Cells
- Adult
- Can turn into most cells
- Embryonic
- Can turn into all cells
- Fix faulty body parts
- Ethics - abortion
- Can turn into all cells
- Unspecialised
- Potentially treat illneses
- Fix faulty body parts
- Adult
- Genes, Chromosomes and DNA
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