Isolation is where populations of a species are seperated.
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The human cell nucleus contains _____ pairs of chromosomes. (There are two No. 19 chromosomes, two No, 12s etc.)
23
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Chromosomes are long lengths of _____ coiled up....
DNA
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A _____ is a short section of this DNA.
Genes
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Chomosomes carry genes. Different genes control the development of _____ characteristics, e.g. hair colour.
Different
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Define: allele
The different versions of the same gene, which give different versions of a characteristic like blue or brown eyes. The differet versions of the same gene are called alleles.
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Define: gene
A unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.
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Gametes (sperm or egg cells) only have _____ allele, but all the other cells in an organism have two.
One
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The allele for the characteristic that's shown is called the _____ allele (use a capital letter for dominant alleles - e.g. 'C').
Dominant
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The allele for the characteristic that's not shown is called the _____ allele (use a capital letter for dominant alleles - e.g. 'c').
Recessive
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Define: genotype
Genotype means what alleles you have.
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Define: phenotype
Phenotype means the actual characteristic.
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Define: gametes
A gamete is a sperm or egg cell.
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When you cross two parents to look at just one characteristic, it's called _____ cross.
Monohybrid
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Cystic Fibrosis is caused by a _____ allele.
Recessive ('f')
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If you have one copy of the allele of cystic fibrosis will you have the disorder?
No - you'll just be known as the carrier.
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For a child to have a change of inheriting cystic fibrosis _____ parent(s) must either be (a) carrier(s) or sufferer(s).
Both
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Symptoms include tiredness, painful joints and muscles, fever and anaemia. → Are these the symptoms for cystic fibrosis or sickle cell anaemia?
Sickle Cell Anaemia
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Symptoms include breathing difficulties, lung infections, malnutrition and fertility problems. → Are these the symptoms for cystic fibrosis or sickle cell anaemia?
Cystic Fibrosis
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Sickle Cell Anaemia is caused by a _____ allele.
Recessive ('a')
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When talking about sickle cell anaemia if you see the ratio of 3:1, (non-sufferer:sufferer) in the offspring would their parents have two the same or different alleles?
Two different.
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Other cards in this set
Card 2
Front
Define: isolation (in scientific terms)
Back
Isolation is where populations of a species are seperated.
Card 3
Front
The human cell nucleus contains _____ pairs of chromosomes. (There are two No. 19 chromosomes, two No, 12s etc.)
Back
Card 4
Front
Chromosomes are long lengths of _____ coiled up....
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