1,015 Questions

Biology

Practice Biology MCQs from the Science syllabus.

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Biology
Genetics

The point on a chromosome where the two sister chromatids are attached is called:

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Biology
Genetics

Which law of Mendel states that factors for different traits are distributed to gametes independently?

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Biology
Genetics

What is the total number of autosomal pairs in humans?

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Biology
Genetics

The DNA segment that codes for a polypeptide is specifically known as:

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Biology
Genetics

If 30% of DNA has Guanine, what is the percentage of Adenine?

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Biology
Genetics

Which type of RNA brings amino acids to the ribosome?

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Biology
Genetics

What is the phenotypic ratio of a backcross with a dominant parent?

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Biology
Genetics

Hemophilia is which type of genetic disorder?

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Biology
Genetics

The functional units of inheritance are:

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Biology
Genetics

In a monohybrid cross between a red flower (RR) and a white flower (rr), if incomplete dominance occurs, the F1 phenotype will be:

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Biology
Genetics

Which scientist used the fruit fly (Drosophila melanogaster) to study genetics?

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Biology
Genetics

A person with blood group O has which alleles?

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Biology
Genetics

Which enzyme is responsible for unwinding the DNA double helix during replication?

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Biology
Genetics

In a dihybrid cross, what is the probability of obtaining an offspring with the genotype rryy?

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Biology
Genetics

If a heterozygous tall plant (Tt) is self-pollinated, the ratio of pure tall to hybrid tall to pure dwarf in the offspring is:

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Biology
Genetics

The 'Law of Purity of Gametes' is another name for:

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Biology
Genetics

How many codons are there in the genetic code for translating 20 amino acids?

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Biology
Genetics

Crossing over occurs during which phase of meiosis?

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Biology
Genetics

If a child has blood group AB and the mother has blood group A, what can NOT be the blood group of the father?

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Biology
Genetics

What is the genotype of a male with color blindness?

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