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bb
homozygous (recessive) ((same))
Bb
hetrozygous (different)
treating genetic disease
no cure- have to treat symptoms
no. of divisions MITOSIS
1
stem cell use in medicine
could use SC to create specialised cells to replace ones damaged by disease/ injury
dna fragments arw separated into …. which is …… to a person and called your ….. …..
dna fargments are separated into bands which is unique to a person and called your genetic profile
ethics of genetic profiling
parents could decide to abort baby if they have a faulty gene + should insurance companies and employers have access to this information
mitosis uses
grow in size
replace dead cells
repair damaged tissues
MEIOSIS daughter cells are
genetically different
result of cells dividing uncontrollably
creates tumour- causes cancer
no. of chromosomes in daughter cells MITOSIS
full set (46 in humans)
DNA shape
double helix
C
cytosine
G
guanine
T
thymine
A
adenine
continuous variation + example
controlled by more than one gene- no distinct categories e.g height
discontinuous variation + example
one gene- can only be in one distinct category e.g blood type
undifferentiated cells + ability
stem cells- potential to divide + produce any kind of cell
what is gene therapy
type of genetic modifiation- healthy genes inserted into cells with faulty genes
ways DNA profile can be used
identify criminals
identify relatives
identify if a person is carrying a genetic disease
indentify the father of the child
phenotype
word to describe your appearance
differentiation definition
process by which a cell becomes specialized for its job
no. daughter cells MEIOSIS
4
MITOSIS daughter cells are
genetically identical
no. of divisions MEIOSIS
2
no. daughter cells MITOSIS
2
no. of chromosomes in daughter cells MEIOSIS
half set (23 in humans)
MITOSIS defenition
when a cell reproduces itself by dividing to form 2 identical offspring
C paired with
G
A paired with
T
ethics of stem cell research
some ppl see it as killing an embryo= bad (killing a person)
others see it than no more than a cluster of cells- taking stem cells can cure diease
for + against genetic modification of crop plants
FOR
increased yields
tobacco plants light up when need watering
AGAINST
unethical
concerns on effect on wildlife
eating them could harm human health
Label the diagram
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