Simple inheritance in animals and plants

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  • Created by: Hope
  • Created on: 18-04-14 14:08
What is DNA?
A molecule that carrys genetic code and that determines the chacteristics of a living thing
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What is a gene?
A section of DNA that has codes for a specific protein
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Explain chromosomes
It is made up of large molecules of DNA and has a double helix structure
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What is mitosis used for?
Repairing or replacing damaged cells
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What cells divide using mitosis>
Body cells
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What are chromosomes usually found in, in body cells?
Pairs
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What is the first stage of mitosis?
The cell duplicates, The DNA is copied and forms x-shaped chromosomes
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What is the second stage of mitosis?
The chromosomes line up at the centre of the cell and the cell fibres pull them apart
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What is the third stage of mitosis>
Membranes form around each set of the chromosomes
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What is the last step of mitosis?
The cytoplasm divides
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What is a gamete>
A sex cell
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What type of cell division produces gametes?
Meiosis
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What cells divide to form gametes?
Cells in the reproductive organs
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What are the female and male reproductive organs?
Ovaries and testes
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How many sets of genetic information do gametes contain?
One
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What is different between animals and plants in terms of differentiation?
Plant cells retain the ability to differentiate throughout life
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What are stem cells?
Cells that can be made to differentiate into many different types of cells
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Where are stem cells found?
Human embyros and adult bone marrow
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What can stem cells be used for?
Stem cell treatment in conditions such as parkinsons and paralysis
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What is meiosis?
When a cell divides to form gametes
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What are alleles?
Different forms of a gene.
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What can alleles be?
Dominant of ressesive
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How many pairs of chromosomes are there in human body cells?
23
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What are the two sex chromosomes in males?
XY
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What are the two sex chromosomes in females?
**
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Complete this sentence: If the charcateristic is controlled by a dominant allele...
It will develop if it is present on one or both chormosomes in the pair
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Complete this sentence: If the characteristic is controlled by a recessive allele...
It will only develop if it is present on both of the chromosomes in the pair
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What is polydactyly?
An inherited conditions in which a person has an extra finger or toes
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What is polydactyly caused by?
By a dominant allele of a gene.
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How can someone inherit cystic fibrosis?
Someone can only inherit it if both parents have it
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Card 2

Front

What is a gene?

Back

A section of DNA that has codes for a specific protein

Card 3

Front

Explain chromosomes

Back

Preview of the front of card 3

Card 4

Front

What is mitosis used for?

Back

Preview of the front of card 4

Card 5

Front

What cells divide using mitosis>

Back

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