Biology- Cell division and inheritance

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What does the, large and complex, DNA carry and what does it determine?
The genetic code tht determines the characteristics of living things
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Why do we use fingerprinting?
Because each persons DNA is unique apart from identical twins.
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What is a gene and what does each code for?
A short section of DNA, each codes for a specific region.
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What does the cells nucleus contain that are made from long DNA molecules?
Chromosomes.
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What do chromosomes contain and what are tehy normally found in?
The cells genetic information, normally found in pairs in the body cells,
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What process devides the body cells?
Mitosis.
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When a body cell devides by mitosis is the genetic material copied?
Yes.
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When the body cell devides are the body cells gentically identical?
Yes.
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When does mitosis occur.
In growth or to produce replacement cells.
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What do cells in the reproductive system produce?
Gametes (sex cells).
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What is the male gamete and where is it produced?
Sperm produced in the testes.
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What is the female gamete and where is it produced?
Eggs produced in the ovaries.
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How many sets of genetic information do gametes contain?
One.
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How man sets of genetic information fo body cells conatin?
Two.
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What is the name of the cell division that produces gametes?
Meiosis.
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What is fertilistation.
The joining or fusion of a male gamet and a female gamete.
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What happens in fertilisation?
The new cell that is formed divides over and over again by mitosis. This creates the many cells that eventually form a new individual.
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Why do animal cell differentiate at an early stage?
To become specialised for a particular function which cannot change.
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When stem cells are made to differentitiate what do they form and give an example?
New types od cells such as nerve cells.
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Name the two types of stem cells and where they come from?
Embryonic from the embryo and adult from the adult bone marrow.
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How many pairs of chromosomes does a human body cell have in the nucleus?
23.
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How many pairs control the inheritance of gender
One.
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Are the two cell chromosomes in male the same and what are they?
No. XY.
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Are the two cell chromosomes in female the same and waht are they?
Yes. XX.
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What is the name given to the characteristics controlled by the same gene which have different forms?
Alleles.
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What does the gen for eye colour have an allele for?
The blue eye and the brown eye.
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Alleles are either dominant or what?
Recessive.
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Which allele are the characteristics controlled by if it is whenever it is present?
The dominant.
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When is the characteristic controlled by the recessive allele?
When both chromosomes are in the pair.
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What are the cels of offsprinng produced by asexual reproduction produced by?
Mitosis from the parental cells.
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Other cards in this set

Card 2

Front

Why do we use fingerprinting?

Back

Because each persons DNA is unique apart from identical twins.

Card 3

Front

What is a gene and what does each code for?

Back

Preview of the front of card 3

Card 4

Front

What does the cells nucleus contain that are made from long DNA molecules?

Back

Preview of the front of card 4

Card 5

Front

What do chromosomes contain and what are tehy normally found in?

Back

Preview of the front of card 5
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