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Inheritance
- Genes
- alleles
- alleles are different
versions of a gene that
produce a variation of
the characteristic
- heterozygous-different
allele on both chromosomes
- homozygous-same allele
on both chromosomes
- dominant or recessive, dominant
masks the effect of a recessive
- alleles are different
versions of a gene that
produce a variation of
the characteristic
- inside a cell
there is a nucleus
which contains
chromosomes
- there are 2 copies
of chromosomes,
each copy has the
same genes
- a gene is a short piece
of DNA coded for a
certain characteristic
- a gene is a short piece
of DNA coded for a
certain characteristic
- there are 2 copies
of chromosomes,
each copy has the
same genes
- alleles
- Monohybrid Inheriance
- when a characteristic is
controlled by a single gene
- a punnett square or family pedigreecan be
used to understand how alleles are inherited
- when a characteristic is
controlled by a single gene
- Genetic Disorders
- the result of inheriting
gene mutations (a change
in a gene's DNA)
- sickle cell disease-caused by having
2 copies of a recessive allele for
the heomoglobin gene, causes
red blood cells to become sickle
cell shaped, feel weak and tired,
sudden pains due to clumps
blocking blood flow
- cystic fibrosis-caused by
having 2 copies of a recessive
allele for a cell membrane
protein, affects movement of
fluid in and out of cells which
forms mucus in the lungs,
increases risk of lung
infections, breathing difficulties
as airways are blocked, weight
loss as enzymes are blocked
from reaching the digestive
system
- caused by a
faulty allele
- the result of inheriting
gene mutations (a change
in a gene's DNA)
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