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Class 12 Biology Practice Test: Inheritance Principles - Inheritance of Two Genes
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Class 12 Biology Practice Test: Inheritance Principles - Inheritance of Two Genes
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23 Questions

1. Which of the following is a correct interpretation of the law of independent assortment?
2. For the cross of axial violet and terminal white flowers, which of the following is incorrect with regards to the F2 generation?
3. If x is the phenotypic ratio of monohybrid cross for trait A and y is the phenotypic ratio of monohybrid cross for trait B, what would be the phenotypic ratio of a dihybrid cross involving traits A and B?
4. The law of independent assortment states that a dihybrid heterozygote would produce four types of gametes.
5. The dihybrid cross was used by Mendel to derive the law of dominance.
6. What law talks about the segregation of two or more traits independent of one another?
7. For a poly hybrid cross concerning N traits, what is the number of types of gametes produced by the F1 generation?
8. What is the expected phenotype of F1 progeny of a dihybrid cross for inflated green pod plants and constricted yellow pod plants?
9. Which law was proposed by Mendel based on his dihybrid cross studies?
10. What is the expected phenotype of F1 generation obtained by the cross between true-breeding round yellow seed plants and true-breeding wrinkled green seed plants?
11. Which of the following phenotypes is not obtained in the F2 generation?
12. All the progeny of F1 generation of a dihybrid cross are genotypically identical for the locus under study.
13. Given the genotype of parents as AABB and aabb, what is the expected genotype of F1 progeny?
14. For a dihybrid cross, the number of squares is 16 in a Punnett square of F2 generation.
15. If round seed (RR) was dominant over wrinkled seed (rr) in a monohybrid cross, and yellow pod (YY) was dominant over brown pod (yy), what should be the starting genotype of parents in a dihybrid cross?
16. A cross involving variation in two different traits is called _______
17. In order to study the inheritance of two genes, the parents should be true-breeding for _______
18. What is the phenotypic ratio of F2 generation in a dihybrid cross?
19. For a poly hybrid cross concerning N trait, what is the number of squares required in the Punnett square to check for the F2 generation?
20. In Mendel’s experiments on garden pea plants, he performed a dihybrid cross of round yellow and green wrinkled seed plants. In the F2 generation, he sampled 1600 plants. Which of the following represents the correct number of plants of each phenotype?
21. What is the zygosity of the F1 progeny of a dihybrid cross?
22. For the cross of round green and wrinkled yellow seeds, which of the following is incorrect with regards to the F2 generation?
23. Which of the following are the correct gametes produced by TtYy?

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