Biology - Dihybrid Cross
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Question 1 of 40
1. Question
Mendel’s second law is:
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Question 2 of 40
2. Question
Mendel’s law of independent assortment can be demonstrated by:
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Question 3 of 40
3. Question
A cross between two pairs of alleles is called:
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Question 4 of 40
4. Question
A cross between plants having RRYY ar rryy composition will yield plants with:
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Question 5 of 40
5. Question
Organism heterozygous for two genes shall be:
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Question 6 of 40
6. Question
Ratio 9:3:3:1 is due to:
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Question 7 of 40
7. Question
Mendel’s dihybrid cross ratio is:
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Question 8 of 40
8. Question
Phenotypic dihybrid ratio in Fe generation is:
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Question 9 of 40
9. Question
In F2 the phenotypic ratio of dihybrid cross is:
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Question 10 of 40
10. Question
Shen a tall plant with round seeds (TTRR) crossed with a dwarf plant with wrinkle seeds (ttrr), the F1 generation consists of tall plants with round seeds. What would be the proportion of dwarf plant with wrinkle seeds in F2 generation?
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Question 11 of 40
11. Question
A dihybrid for qualitative trait is crossed with homozygous recessive individual of its type , the phenotypic ratio is:
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Question 12 of 40
12. Question
When two hybrids of rr Tt and Rrtt are crossed, the phenotypic ratio of offsprings shall be:
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Question 13 of 40
13. Question
Tall pea plant with red flower crossed to dwarf with white flower yields only tall red plants. A test cross shall give a ratio of:
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Question 14 of 40
14. Question
The ratio of 1:1:1:1 is obtained from a cross between the parents:
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Question 15 of 40
15. Question
Phenotypic ratio of dihybrid test cross is:
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Question 16 of 40
16. Question
IN a dihybrid cross pure homozygous plants will be:
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Question 17 of 40
17. Question
Genotypic ratio of dihybrid cross is:
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Question 18 of 40
18. Question
IN pumpkins, Yellow (Y) is dominant over white (y); big (B) is dominant over small (b0. What is the expected phenotypic ratio of the offsprings when pumpkins, heterozygous for both traits are crossed?
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Question 19 of 40
19. Question
In a dihybrid cross AABBx aabb,F2 progeny of ARBB, AABbm Aa BB and Aa Bb occurs in the ratio of:
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Question 20 of 40
20. Question
Mendel,s law of independent assortment is based on Fe ratio of:
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Question 21 of 40
21. Question
Female Aa Bb is crossed with male AAbb. The gametes shall be:
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Question 22 of 40
22. Question
From a cross AABbx aaBb, the genotypes AaBB, Aabb, aabb will be obtained in the following ratio:
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Question 23 of 40
23. Question
In a certain plant, red fruit (R) is dominant over yellow fruit (r) and tallness (R) is dominant over dwarfness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt, what will be the percentage of tall plants , with red fruits in the progeny?
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Question 24 of 40
24. Question
In guninea pigs, smooth coat (S) is dominant over rough coat (s) and black coat (B) is dominant over white coat (b). In the cross SsBbx SsBb, how many of the offspring will have a smooth black coat on average?
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Question 25 of 40
25. Question
In humans, short fingers and discontinuous hairline are dominant over long fingers and continuous hairline. A heterozygote in both regards reproduces with a similar heterozygote. What is the chance of any one child having the same phenotype as the parents?
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Question 26 of 40
26. Question
A human male produces sperms with the genotypes AB. AB. aB , and ab pertaining to two ciallelic characters in equal proportions. What is the corresponding genotype of this person?
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Question 27 of 40
27. Question
The cytological event that corresponds to Mendel,s law of independent assortment is seen in:
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Question 28 of 40
28. Question
Which of the these could be a normal gamete?
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Question 29 of 40
29. Question
Gametes of AaBb individuals can be:
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Question 30 of 40
30. Question
Genetic traits are often carried on sieparate chromosomes. Which of the following genotype represent a dihybrid organism?
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Question 31 of 40
31. Question
An individual heterozygous for two alleles (CcDd) produce one million sperms; how many of the sperms will have both dominant alleles?
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Question 32 of 40
32. Question
Probabilityof genotype TT rr in F2 generation of dihybrid cross is:
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Question 33 of 40
33. Question
Probabilityof genotype TTrr in F2 generation of dihybrid cross is:
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Question 34 of 40
34. Question
Mendelian recombination are due to:
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Question 35 of 40
35. Question
Independent assortment means:
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Question 36 of 40
36. Question
IN Mendelism, linkage was not observed due to:
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Question 37 of 40
37. Question
Mendel did not notice /An exception to Mendel’s laws:
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Question 38 of 40
38. Question
If Mendel had studied the 7 traits using a plant with 12 chromosomes instead of 14, in what way would the interpretation have been different?
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Question 39 of 40
39. Question
Which of the following demonstrates ‘the law of independent assortment’?
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Question 40 of 40
40. Question
Law of Mendel, which is not completely applicable, is:
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