The genetic makeup of an organism.The different charactisics that an indiviual inherits, Eg. Whether you have dimples.
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What is a PHENOTYPE?
The observable charactistics that oranism has. How the environment changes an individual, Eg. Cutting the skin may cause a scar.
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How many CHROMOSOMES does a human have?
23 PAIRS OF CHROMOSOMES.
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What is a CHROMOSOME?
A thread-like structure of nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
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What is a GENE?
A short section of DNA, Which carries instructions that control how you develop and function.
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DOMINANT AND RECESSIVE ALLELE
DOMINANT ALLELE- A
RECESSIVE ALLELE- a
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what is CYSTIC FIBROSIS?RECESSIVE OR DOMINANT?
RECESSIVE ALLELE.
You need to inherit two copies of the faulty allele to be born with it.
If you have it your a CARRIER.
Thick and sticky mucus
Breathing promblems
Chest infections
Difficulty digesting food
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HUNTINGTONS DISEASE? RECESSIVE OR DOMINANT?
DOMINANT ALLELE.
Affects the nervous system
You can only inherit one copy of the faulty allele.
You can get it if one or both parents carry the allele.
Uncontrollable shaking
Clumisness
Memory loss
Inability to concentrate
Mood changes
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What is ASEXUAL REPRODUCTION?
When it only requires one parent, unlike sexual reproduction you need two.
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What is SEXUAL REPRODUCTION?
Where it requires two parents to make a baby.
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Will the OFFSPING will be female or male?
The offspring will be 50% female and 50% male. 50/50
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X AND Y CHROMOSOMES?
Mother- **
Father- XY
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Examples of UNSPECIALISED CELLS?
ADULT STEM CELLS
EMBRONIC STEM CELLS
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Do animails clone naturally?
Yes,durning the earliest stages of fertitation, the developing embryo splits into two, they have the same genes.As the genes come from both parents they are not clones of either parent, but they are natural clones of each other.
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VEINS?
Carry blood from the organs back to the heart.Substances cannot pass through the walls of the vein.
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ARTERIES?
Carry blood AWAY from the heart TOWARDS the organs. Substances cannot pass through the artery walls.
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CAPPILLIRIES?
Allow food and oxygen to diffuse to cells while waste is diffused from cells.
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Why might a HEART ATTACK happen?
Fatty deposits build up in the coronary arties.
A blood clot can form on a fatty deposit.
The blood clot can block a coronary artery.
Some heart muscle cells do not get the oxygen and nutrients the need.
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