Biology - Monohybrid Cross
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Question 1 of 42
1. Question
When a cross is made between two parents with respect to a single character, it is called :
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Question 2 of 42
2. Question
Mendel formulated the law of purity of gametes on the basis of:
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Question 3 of 42
3. Question
Law of dominance- recessivencess is proved by:
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Question 4 of 42
4. Question
Monohybrid cross involves individuals:
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Question 5 of 42
5. Question
Which of the following is the monohybrid ratio:
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Question 6 of 42
6. Question
When a tall pea plant )TT) is crossed with a dwarf plant (tt) , what will be the F2 generation?
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Question 7 of 42
7. Question
A monohybrid cross produced tall and dwarf plants in the ratio 3:1. The genotype of the hybrids can be:
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Question 8 of 42
8. Question
In a cross 45 tall and 14 dwarf plants were obtained .Genotypes of parents are:
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Question 9 of 42
9. Question
In a monohybrid cross, the genotypic ratio of F2 is:
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Question 10 of 42
10. Question
In all of Mendel’s experiments, the two alleles causing a trait were:
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Question 11 of 42
11. Question
If two alleles come together, only one is able to express self. This is called:
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Question 12 of 42
12. Question
The character which appears at F1 generation is:
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Question 13 of 42
13. Question
A gene is said to dominant if:
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Question 14 of 42
14. Question
Pure tall plants are crossed with pure dwarf plants. In the f1, generation all plants were tall. These tall plants of F1 generation were self ed and the ratio of tall to dwarf plant obtained was 3:1 . This is called:
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Question 15 of 42
15. Question
Two crosses between the same pair of genotypes o phenotypes in which the sources of the gametes are reversed in one cross, is known as:
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Question 16 of 42
16. Question
Pure red – flowered and white – flowered plants were crossed. It produced 120 offspring with:
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Question 17 of 42
17. Question
A homozygous plant with red flower is crossed with recessive white.Red is dominant over white. The progeny in the F1 generation will be:
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Question 18 of 42
18. Question
How many types of gametes will be produced in F2 generation of a monohybrid cross of Mendel?
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Question 19 of 42
19. Question
Considering tallness and dwarfness, tallness is more widespread among pea plants because:
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Question 20 of 42
20. Question
A red- flowered pea plant was crossed with white- flowered plant. In f1 generation all plants were red. It confirms that white col lour is:
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Question 21 of 42
21. Question
One of Mendel’s pure strains of pea plants had white flowers. How many different kinds of eggs could such a plant produce with regard to flower colour?
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Question 22 of 42
22. Question
A woman with straight hair mates with a man with curly hair who is known to be heterozygous for that trait. What is the chance that their first child will have curly hair?
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Question 23 of 42
23. Question
Percentage of heterozygous individuals obtained from selfing Rr individuals is:
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Question 24 of 42
24. Question
If the frequency of a recessive phenotype in a stable population is 25% the frequency of recessive allele in the population would be:
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Question 25 of 42
25. Question
Black coat of guinea pigs is a dominant trait: white is the recessive trait. When a pure black guinea pig is crossed to a white one, what fraction of the black f2 is expected to be heterozygous?
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Question 26 of 42
26. Question
Which statement about Mendel’s cross of RR peas with rr peas is not true?
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Question 27 of 42
27. Question
A heterozygous round seeded (Rr) plant is crossed to recessive wrinkled (rr) seeded plant. The progeny would be:
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Question 28 of 42
28. Question
A pure tall and a pure dwarf plant were crossed to produce offspring’s. Offspring were self- crossed, then find out the ratio between true breeding tall to true breeding dwarf?
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Question 29 of 42
29. Question
In human being, brown eye (B) is dominant over blue eye (b). A brown- eyed couple has a blue- eyed child. What is the possible genotypes of the couple :
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Question 30 of 42
30. Question
Which of the following crosses and resultant phenotypic ratios are mismatched?
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Question 31 of 42
31. Question
Mendel’s law of independent assortment is applicable for:
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Question 32 of 42
32. Question
IN humans, freckles are dominant over no freckles. A man with freckles marries a woman having freckles, but the children have no freckles,. What chances did each child have for freckles?
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Question 33 of 42
33. Question
In fruit flies, L= long wings and /= short wings. The offsprings exhibit a 1:1 ratio when a long- winged fly is crossed with short – winged fly> What is thegenotype of par antes?
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Question 34 of 42
34. Question
In the garden pea, round seeds are dominant over wrinkled seeds. An investigator crosses a plant having round seeds with a plant having wrinkled seeds. He counts 400 offspring. How many of the offspring have wrinkled seeds if the plant having round seeds is a heterozygote?
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Question 35 of 42
35. Question
In human, pointed eyebrows (B) are dominant over smooth eyebrows (b) sara’s father has pointed eyebrows, but she and her mother have smooth. What is the genotype of the father?
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Question 36 of 42
36. Question
IN peas, yellow seed (Y) is dominant over green seed (y) . In the F2 generation of a monohybrid cross that begins when a dominant homzygote is crossed with a recessive homozygote, you would expect:
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Question 37 of 42
37. Question
A tobacco plant heterozygous for albinism ( a recessive character ) is self- pollinated and 1200 seeds are subsequently germinated. How many seedlings would have parental genotype?
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Question 38 of 42
38. Question
if a cross is made between AA and aa, the nature of F1 progeny will be:
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Question 39 of 42
39. Question
Ratio of progeny when a red coloured heterozygote is crossed with a white coloured plant in which red colour in dominant to white colour:
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Question 40 of 42
40. Question
Two pea plants were subjected cross pollination. Of the 183 plants produced in the next generation 94 plants were found to be tall and 89 plants were found to be dwarf. The genotypes of the two parental plants are likely to be:
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Question 41 of 42
41. Question
Chi – square test is:
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Question 42 of 42
42. Question
Segregation of Mendelian factors ( no linkage no crossing over) occurs during :
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