B1. You and your genes
- Created by: ellie_mayy
- Created on: 14-05-16 10:02
View mindmap
- B1: You and your genes.
- Variation
- Differences between individuals
- Caused by
- Genetic Factors
- Environmental Factors
- Genetic Information
- Genes
- Occur in long strings called chromosomes
- Located in the nucleus
- Carry Info needed for you to develop
- Form Instructions by making proteins
- Structural Proteins = For growth and repair
- Functional Proteins = speed p chemical reactions
- Form Instructions by making proteins
- Chromosomes
- Made of DNA molecules
- DNA = Two long strands coiled to from a double helix.
- Contains Instructions
- Come in pairs
- Both have the same sequence of genes
- Made of DNA molecules
- Alleles
- Different versions of the same gene
- Homozygous = Two of the SAME alleles
- Hetrozygous = two DIFFERENT alleles
- Phenotype = Combination of alleles you have
- Genotype = the characteristics you show
- Dominant
- Recessive
- Genes
- Diseases
- Huntington Disease
- Genetic disorder affects the CNS
- Cause by 4th Chromosome
- Allele is DONIMANT
- Symptoms
- Involuntary Movements
- Memory Loss
- Clumsiness
- Cystic Fibrosis
- Allele is RECESSIVE
- Causes sticky mucus around the lungs
- Symptoms
- Weight Loss
- Chest Infections
- Difficulty Breathing
- Huntington Disease
- Genetic testing
- Testing on Adults + Children
- Adults test to see if they are carriers of a allele
- If positive
- Mat not have children
- May adopt a child
- May accept the risk
- If positive
- Child tested to see if they have disease gene
- Adults test to see if they are carriers of a allele
- Testing on Fetus
- They Fluid around the fetus can be tested
- Risk of Miscarriage
- Ethical concerns
- Reliability
- True Positive
- True Negative
- False Positive
- False Negative
- Testing on Adults + Children
- Embryo Selection
- IVF
- 1. Ova are harvested and fertilised
- 2. Embryo's tested for faulty gene
- 3. Healthy embryo placed back in mother
- Pre-Implantation Genetic diagnosis
- 1. Once embryo at 8 cells one cell remove for testing
- 2. Cells tested to see if they are carriers
- Controversial
- Unnatural
- Designer babies
- IVF
- Cloning
- 4 different ways
- Asexual Reproduction
- Cells reproduce by dividing into two identical cells
- Mostly active in plants
- Cells reproduce by dividing into two identical cells
- Naturally
- Cell of embryo splits
- Produces Identical twins
- Cell of embryo splits
- Plant Cuttings
- Artifically
- 1. Nucleus from adult body cell transferred into a unfertilised cell
- 2. New individual will have same characteristics as the donor
- 1. Nucleus from adult body cell transferred into a unfertilised cell
- Asexual Reproduction
- 4 different ways
- Variation
Comments
Report