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21 Cards in this Set
- Front
- Back
Chromosomes are made up of? |
Genes |
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What are genes made up |
DNA |
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What do genes contain and do |
Contain genetic info to make a protein that produces a characteristic |
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Chromosomes are where? |
Inside the nucleus |
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Zygote |
Two nuclei fused together and egg has been fertilised |
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Embryo |
Zygote starts to develop |
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Karyotype |
Map of chromosomes and helps find abnormalities Numbered In order of size and varies a lot |
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23rd Chromosomes |
Boy - (X,Y) Girl - (X,X) |
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How many homologous pairs if a boy |
22 |
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How many homologous pairs if a girl |
23 |
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Homologous Chromosomes |
A pair of chromosomes Genes for the same characteristics and they match up |
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Egg give which chromosome? |
X |
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Sperm give which chromosomes |
X and Y |
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Down Syndrome Cause |
Extra 21st Chromosome |
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Down System Effect |
Development Disorder |
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Turner Syndrome Cause |
Only 1 X chromosome in 23rd pair |
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Turner Syndrome Effect |
Always a girl Shorter Dont produce enough hormones to go through puberty Not developed sexually |
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Alleles |
A pair of chromosomes (two versions of the same genes) |
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Diploid Cells |
Full set of DNA |
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Haploid Cell |
Half a set of DNA |
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DNA |
Chromosomes coiled into double helix structure |