Life Sciences
2018 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE XL 2018 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 64–66 of 125. Imported answers require review unless explicitly marked reviewed.
Question 19
Open questionXL-RNAT2 marksNeeds review
In garden pea, dwarf plants with terminal flowers are recessive to tall plants with axial flowers. A true-breeding tall plant with axial flowers was crossed with a true-breeding dwarf plant with terminal flowers. The resulting F₁ plants were testcrossed, and the following progeny were obtained:
Tall plants with axial flowers = 320
Dwarf plants with terminal flowers = 318
Tall plants with terminal flowers = 79
Dwarf plants with axial flowers = 83
The map distance between the genes for plant height and flower position is_____cM.
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Open questionXL-RNAT2 marksNeeds review
Two true-breeding snapdragon (Antirrhinum majus) plants, one with red flowers and another with white flowers were crossed. The F₁ plants were all with pink flowers. When the F₁ plants were selfed, they produced three kinds of F₂ plants with red, pink and white flowers in a 1:2:1 ratio. The probability that out of the five plants picked up randomly, two would be with pink flowers, two with white flowers and one with red flowers is ____%.
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Open questionXL-SMCQ1 markNeeds review
David Baltimore’s classification of viruses is based on differences in
Your answerChoose one option.
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