null
US
Sign In
Sign Up for Free
Sign Up
We have detected that Javascript is not enabled in your browser. The dynamic nature of our site means that Javascript must be enabled to function properly. Please read our
terms and conditions
for more information.
Next up
Copy and Edit
You need to log in to complete this action!
Register for Free
720753
Biology B1
Description
Mind Map on Biology B1, created by Sysode on 04/05/2014.
Mind Map by
Sysode
, updated more than 1 year ago
More
Less
Created by
Sysode
almost 11 years ago
22
0
0
Resource summary
Biology B1
Genes
Instructions for cells, which makes protein for your body
Genotype / Phenotype
Genotype - all of the genes it has
Phenotype - characteristics an organism displays
Sperm and egg cells
23 chromosomes for both the egg and sperm cell
The two combine when sperm fertilises egg
Children resemble both parents
Alleles gained from both parents (some not all)
Each child has a unique combination of alleles
The combination of alleles determines the phenotype
Homozygous - 2 alleles the same
Heterozygous - 2 different alleles
Punnet Square shows this
lowercase = recessive -- upper = dominant
Genetic Disorders
Caused by faulty Genes
Recessive and Dominant genes can cause
Recessive diseases
Cystic Fibrosis
both parents must be a carrier
Dominant Diseases
Huntington's disease
Carrier parent will be a sufferer as wel
Genetic Testing
Can be used on Embryos, adults and children
IVF
Test on an embryo to see if the parent is a carrier - only healthy alleles used to create baby
Ethical Issues
Not 100% accurate
Slight chance of miscarrige
Pressure for parents
Every child has the right to live - people think abortion is always wrong
Insurance companies refuse to insure ill people
Clones
Genetically identical organisms
Asexual Reproduction
1 parent where off-spring is identical to parent
Normally in plants and bacteria but also some animals
EG - Strawberry plants
Embryo splitting
Single egg is fertilised by sperm, embryo develops as normal but then splits
Embryos then develop as normal
In the lab
Nucleus (no egg) and egg from other parent is put together and stimulated to divide
Stem Cells
Embryonic
Unspecialised and found in early embryos
Develop into any cell
Adult
Unspecialised and found in adult animals
Involved in maintaining and repairing damaged tissues
Treat illnesses (bone marrow transplant)
Show full summary
Hide full summary
Want to create your own
Mind Maps
for
free
with GoConqr?
Learn more
.
Similar
Biology B1
miles.a.moran
Adaptation and survival
Elliemd
Adaptation and survival
ALISON ROBSON
B1 Understanding Ourselves
alexfisherxoxo
Biology B1 Revision
Ethan Bayes
Untitled
ayanmohamed1
Biology- Genes and Variation
Laura Perry
Ionic Bonding
Evangeline Taylor
Maths GCSE - What to revise!
sallen
The Periodic Table
asramanathan
Present Simple Vs Present Continuous
Luis Alcaraz
Browse Library