3326880
Descripción
Mapa Mental por Lisa Cracknell, actualizado hace más de 1 año
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Creado por Lisa Cracknell
hace más de 9 años
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B1
- B1
- Genetic traits
- Passed through genes
- Either dominant or recessive
- Either dominant or recessive
- Passed through genes
- Sex deterimination
- If a defective
gene in found on
parts of the X
chromosome, it
can result in
sex-linked
diseases
- More likely in men
- More likely in men
- Female has two X chromosomes
- Male has an X and a Y chromosome
- The Y chromosome triggers the growth of
the testes, without it, ovaries develop
- The Y chromosome triggers the growth of
the testes, without it, ovaries develop
- Male has an X and a Y chromosome
- If a defective
gene in found on
parts of the X
chromosome, it
can result in
sex-linked
diseases
- Gene disorders
- Some disorders
are caused by
faulty or defective
alleles
- Huntington's disease is a dominant disorder
- Occurs in middle age
- Symptoms include tremors, memory loss,
inability to concentrate and mood changes
- Occurs in middle age
- Cystic fibrosis is a recessive disorder
which means both alleles must be recessive
for you to get it
- Symptoms includes production of thick gluey mucus that affects
lungs and digestion, breathing problems and chest infections
- You can be a carrier for this and
still be normal
- Symptoms includes production of thick gluey mucus that affects
lungs and digestion, breathing problems and chest infections
- Some disorders
are caused by
faulty or defective
alleles
- Genetic traits
- We're all different
- Characteristics controlled
by genes and enviroment
- Phenotype= physical
- Genotype= genetic
- Characteristics controlled
by genes and enviroment
- What genes do
- Functional proteins enable
body to function
- Structural
proteins give the
body structure
- DNA=
packed into
chromosomes
- Carry instructions= control how develop& function
- Tells body what proteins it needs
- Gene=section of DNA
- Gene=section of DNA
- Tells body what proteins it needs
- Carry instructions= control how develop& function
- DNA=
packed into
chromosomes
- Functional proteins enable
body to function
- Genes& chromosomes
- Sex cells= 23 chromosomes
- 46 cmromosomes
- At fertilisation= Zygote
- Combination from
parents causes
variation
- Pairs of chromosomes have genes
for the same characteristic
- Pairs of chromosomes have genes
for the same characteristic
- Combination from
parents causes
variation
- 46 cmromosomes
- Sex cells= 23 chromosomes
- Alleles
- Different forms of gene
- Homozygous= same
- Heterozygous= different
- Homozygous= same
- Different forms of gene
- Genetic testing
- Genetic screening is used to check for
a disorder even when there is no history
- Genetic testingis carried out when a
genetic disease runs in the family
- Ethical issues include who should know if
someone has a disorder like Huntington's
- Tests during pregnancy carry risk of miscarriage
- IVF allows doctors to only implant normal embryos
- Ethical issues include playing God however can allow people to plan
- Ethical issues include playing God however can allow people to plan
- IVF allows doctors to only implant normal embryos
- Tests during pregnancy carry risk of miscarriage
- Ethical issues include who should know if
someone has a disorder like Huntington's
- Genetic testingis carried out when a
genetic disease runs in the family
- Genetic screening is used to check for
a disorder even when there is no history
- Stem cells
- A human embryo develops from a single cell
- Five days= ball of cells containing embryonic stem cells
- These are unspecialised and can turn into any cell in body
- Adult stem cells have limited uses
- Ethical issues
- Usually taken from unused embryos in fertility treatments
- Using them involves destroying embryos
- Using them involves destroying embryos
- Usually taken from unused embryos in fertility treatments
- Adult stem cells have limited uses
- These are unspecialised and can turn into any cell in body
- Five days= ball of cells containing embryonic stem cells
- A human embryo develops from a single cell
- Cloning
- Have identical genes
- In asexual reproduction the offspring is in identical to the parent
- Identical twins happen when a fertilised egg splits
- Artificial cloning: Nucleus from body cell is inserted
into egg cell then implanted into surrogate mother
- Artificial cloning: Nucleus from body cell is inserted
into egg cell then implanted into surrogate mother
- Identical twins happen when a fertilised egg splits
- In asexual reproduction the offspring is in identical to the parent
- Have identical genes
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