Biotechnology
GATE BT topic:genetics-evolutionary-biology PYQs
Build your understanding with focused practice from past exam papers.
Questions 21–27 of 27. Imported answers require independent review unless marked reviewed.
Question 31
Open questionBTMCQ2 marksNeeds review
In tomato plant, red (R) is dominant over yellow (r) for fruit color and purple (P) is dominant over green (p) for stem color. Fruit color and stem color assort independently. The number of progeny plants of different fruit-stem colors obtained from a mating are as follows:
Red fruit, purple stem – 145
Red fruit, green stem – 184
Yellow fruit, purple stem – 66
Yellow fruit, green stem – 47
What are the genotypes of the parent plants in this mating?
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 9
Open questionBTMCQ1 markNeeds review
Which of the following processes can increase genetic diversity of bacteria in nature?
P. Conjugation
Q. Transformation
R. Transduction
S. Transfection
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 19
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The number of possible rooted trees in a phylogeny of three species is __________.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 30
Open questionBTMCQ2 marksNeeds review
Which one of the following is coded by the ABO blood group locus in the human genome?
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 47
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In pea plants, purple color of flowers is determined by the dominant allele while white color is determined by the recessive allele. A genetic cross between two purple flower-bearing plants results in an offspring with white flowers. The probability that the third offspring from the parents will have purple flowers is ______ (rounded off to 2 decimal places).
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 38
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A pedigree of an inheritable disease is shown below.
What type of inheritance does the disease follow?
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 45
Open questionBTMCQ2 marksNeeds review
A pedigree of an inheritable disease is shown below.
This inheritable disease is
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