MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
For the cross of axial violet and terminal white flowers, which of the following is incorrect with regards to the F2 generation? |
| A. | Axial violet are nine times more abundant than white flowers |
| B. | Axial white flowers are as abundant as terminal violet flowers |
| C. | Terminal white flowers are thrice abundant than the axial white flowers |
| D. | Terminal violet flowers are three times more abundant than terminal white flowers |
| Answer» D. Terminal violet flowers are three times more abundant than terminal white flowers | |
| 2. |
The dihybrid cross was used by Mendel to derive the law of dominance. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
A cross involving variation in two different traits is called _______ |
| A. | monohybrid cross |
| B. | dihybrid cross |
| C. | bihybrid cross |
| D. | polyhybrid cross |
| Answer» B. dihybrid cross | |
| 4. |
For the cross of round green and wrinkled yellow seeds, which of the following is incorrect with regards to the F2 generation? |
| A. | Round seeds were three times more abundant than yellow seeds |
| B. | Green seeds were three times less abundant than wrinkled seeds |
| C. | Round seeds were as abundant as the green seeds |
| D. | Yellow seeds were three times more abundant than green seeds |
| Answer» E. | |
| 5. |
Which of the following phenotypes is not obtained in the F2 generation? |
| A. | Round yellow seeds |
| B. | Wrinkled green seeds |
| C. | Wrinkled round seeds |
| D. | Round green seeds |
| Answer» D. Round green seeds | |
| 6. |
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? |
| A. | Round green seeds |
| B. | Round yellow seeds |
| C. | Wrinkled green seeds |
| D. | Wrinkled yellow seeds |
| Answer» B. Round yellow seeds | |
| 7. |
All the progeny of F1 generation of a dihybrid cross are genotypically identical for the locus under study. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
What is the zygosity of the F1 progeny of a dihybrid cross? |
| A. | Homozygosity |
| B. | Heterozygosity |
| C. | Hemizygostiy |
| D. | Nullizygosity |
| Answer» C. Hemizygostiy | |
| 9. |
Given the genotype of parents as AABB and aabb, what is the expected genotype of F1 progeny? |
| A. | AABB |
| B. | AAbb |
| C. | aaBB |
| D. | AaBb |
| Answer» E. | |
| 10. |
What is the expected phenotype of F1 progeny of a dihybrid cross for inflated green pod plants and constricted yellow pod plants? |
| A. | Inflated green pods |
| B. | Inflated yellow pods |
| C. | Constricted green pods |
| D. | Constricted yellow pods |
| Answer» B. Inflated yellow pods | |
| 11. |
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? |
| A. | RRrr and YYyy |
| B. | RRYY and rryy |
| C. | RRyy and YYrr |
| D. | RrYy and RrYy |
| Answer» C. RRyy and YYrr | |
| 12. |
In order to study the inheritance of two genes, the parents should be true-breeding for _______ |
| A. | a single contrasting characters |
| B. | a pair of contrasting characters |
| C. | a pair of chromosomes |
| D. | a single chromosome |
| Answer» C. a pair of chromosomes | |