Science B1

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Where are Chromosomes found?
In the Nucleus
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What are Alleles?
Different forms of a gene, either dominant or recessive
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Define Genotype
All of the same genes
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Define Phenotype
Characteristics that an organism displays
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Define Recessive
The allele only shows if the individual has two copies of the recessive allele.
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Define Dominant
allele always shows, even if the individual only has one copy of the allele.
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Define Homozygous
gene carry two copies of the same allele
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Define Hetrozygous
gene carry two different alleles
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How many Chromosomes does a human have?
They have 46, or 23 pairs
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Cystic fibrosis allele
Recessive
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Huntington Disease allele
Dominant
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Genetic Testing
This is a test to check wether a baby is a carrier of a generic disorder, and used during IVF to test the embryo
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Define Clone
Genetically identical organisms
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What is Asexual reproduction?
Their is only one parent, the offspring is genetically identical to each other and the paren.t
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How does Asexual reproduction work?
Bacteria - Divide into two, multiply very quickly. Plants - Horizontal stems called runners more from the base of the plant and form clones.
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What are stem cells?
They can become other types of cells, they develop into different types of cells depending on what instructions are given.
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Embryonic stem cells
Unspecialised cells found in a early embryo, they can make any kind of cell at all.
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Adult stem cells
Unspecialised cells that can be found in adult animals, they are used in maintaining and repairing old and damaged tissues, they can only specialise into many cell types but not all.
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Cystic Fibrosis symptoms
Thick stick mucus in the airways and pancreas, difficulty breathing, chest infections, difficulty digesting foods.
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Huntington disease symptoms
Shaking, clumsiness, memory loss, mood changes and poor concentration.
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Other cards in this set

Card 2

Front

Different forms of a gene, either dominant or recessive

Back

What are Alleles?

Card 3

Front

All of the same genes

Back

Preview of the back of card 3

Card 4

Front

Characteristics that an organism displays

Back

Preview of the back of card 4

Card 5

Front

The allele only shows if the individual has two copies of the recessive allele.

Back

Preview of the back of card 5
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