Class 9 | Heredity and Variation

What is sexual reproduction?

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What is variation?

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DNA was discovered by

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…........ is a monogenic disorder

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What is genetic variation?

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The chromosome in which the centromere is near one end of the chromosome is called ….... chromosome.

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The double helix model of DNA was produced by

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Progenies of normal man and sufferer woman for sickle-cell anaemia will be …..........

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Which of the following is absent in RNA?

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In a monohybrid cross, the phenotypic ratio of F2 generation is

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What is a gene?

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What is a chromosome?

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Sex chromosomes are called …..........

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If one parent is carrier and one parent is a sufferer of sickle-cell anaemia, then the progenies will be

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What is a mutation?

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What is genotype?

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The molecule of RNA which is a component of the ribosome organelle is called a

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If one parent is normal and one parent is carrier of sickle-cell anaemia, then the progenies will be

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….... is a mitochondrial disorder.

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…........ is a dominant character in human beings

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….. is a recessive character of pea plant

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What is phenotype?

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…........ is a dominant character of pea plant.

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….......... arises due to either inheritance of only X chromosome from parents or due to inactivation of the gender-related part of X-chromosomes.

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What are dominant traits?

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What is DNA?

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What are recessive traits?

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…........ is a recessive character in human beings.

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What is genetic variation?

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What is heredity?

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Class 9 | Science | Heredity and Variation

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What is genetic variation?

The diversity of alleles and genes within a population or species.

The passing on of physical or mental characteristics genetically from one generation to another.