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Explain the mechanism of transcription in a prokaryotic cell.
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A substance that stimulates the production of antibodies is called ______.
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Briefly explain the role of the following in providing defence against infection in the human body:
B-cells
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Briefly explain the role of the following in providing defence against infection in the human body:
T-cells
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Observe the relation between the first two words and then fill in the fourth word.
Histamine: Mast cells :: Antibody: ______.
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State Hardy-Weinberg’s principle.
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Differentiate between Directional natural selection and Disruptive natural selection.
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What is the Founder's effect?
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State Hardy Weinberg's principle.
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Give a mathematical expression for Hardy Weinberg's principle.
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A population of 200 fruit flies is in Hardy Weinberg equilibrium. The frequency of the allele (a) 0.4. Calculate the following:
Frequency of the allele (A).
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A population of 200 fruit flies is in Hardy Weinberg equilibrium. The frequency of the allele (a) 0.4. Calculate the following:
The number of homozygous dominant fruit flies.
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A population of 200 fruit flies is in Hardy Weinberg equilibrium. The frequency of the allele (a) 0.4. Calculate the following:
The number of homozygous recessive fruit flies.
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A population of 200 fruit flies is in Hardy Weinberg equilibrium. The frequency of the allele (a) 0.4. Calculate the following:
The number of carrier fruit flies.
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The black colour on the beak of finches dominates over the yellow colour. There are 210 individuals with the genotype DD, 245 individuals with the genotype Dd and 45 individuals with the genotype dd. Deduce the frequency of individuals with dominant, heterozygous, and recessive traits.
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Define Apomixis.
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The genotype of a person withTumer's syndrome will be:
(i) 44+XXY
(ii) 44+XYY
(iii) 44+XO
(iv) 44+XXYY
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An antiviral protein released from infected and dying cells is ______.
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Expand the following: SCID
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Name the antibody which is most effective in allergies.
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