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7 Cards in this Set
- Front
- Back
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Give 3 reasons for chlorosis: |
Lack of light - conserve resources. Lack of Minerals - mg middle of chlorophyll and fe = cofactor for some chlorophyll enzymes. Viral infections - affect metabolism- V.L.M V love me |
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What is a dominant allele ? |
An allele which will be expressed, regardless of whether there are one or two of these alleles present in the organism. |
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What is a recessive allele ? |
An allele which will only be expressed if there are two copies present in the organism |
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State the differences between discontinuous and continuous variation : |
Certain specific values / range(continuum) between two extremes. Mostly genetic/ mixture. One or two genes control/ polygenetic. |
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What is the term given to an individual who has a homozygous pair of alleles for a specific gene? |
Pure /true breeding individuals . |
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2 reasons why the phenotypic ratios in dihybrid inheritance may not ring true : |
The two alleles separate genes may be on the same chromosome -linked- inherit one with the other. Or sexual reproduction- random fertilisation . |
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What are the conditions of dehydrating (elimination) |
Conc sulfuric acid catalyst + water vapour or passing vapours over HEATED Al2O3 plus 600K |
