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MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 5601. |
When a true breeding pea plant that has yellow seeds is pollinated by a plant that has green seeds, all the \[{{F}_{1}}\] plants have yellow seeds. This means that the allele for yellow is [MP PMT 1993] |
| A. | Heterozygous |
| B. | Dominant |
| C. | Recessive |
| D. | Lethal |
| Answer» C. Recessive | |
| 5602. |
An allele is said to be dominant if [CBSE PMT 1999] |
| A. | It is expressed only in heterozygous combination |
| B. | It is expressed only in homozygous combination |
| C. | It is expressed in both homozygous and heterozygous condition |
| D. | It is expressed only in second generation |
| Answer» D. It is expressed only in second generation | |
| 5603. |
When a gene exists in more than one form, the different forms are called [MP PMT 1994; CPMT 2002] |
| A. | Heterozygous |
| B. | Complementary genes |
| C. | Genotypes |
| D. | Alleles |
| Answer» E. | |
| 5604. |
Alleles which show independent effect are called [CBSE PMT 1996] |
| A. | Supplementary alleles |
| B. | Codominant alleles |
| C. | Epistatic alleles |
| D. | Complementary alleles |
| Answer» C. Epistatic alleles | |
| 5605. |
The first "geneticist'' was [RPMT 1984] |
| A. | Engler |
| B. | Mendel |
| C. | Schwann |
| D. | Miller |
| Answer» C. Schwann | |
| 5606. |
The term 'allelomorphic' implies [MP PMT 1997] |
| A. | Any two characters |
| B. | A pair of contrasting characters |
| C. | Sex linked characters |
| D. | A pair of non-contrasting characters |
| Answer» C. Sex linked characters | |
| 5607. |
Who proposed the term 'Allelomorph' |
| A. | De Vries |
| B. | Morgan |
| C. | Tschermak |
| D. | Bateson |
| Answer» E. | |
| 5608. |
What type of gametes will form by genotype RrYy [RPMT 2002] |
| A. | RY, Ry, rY, ry |
| B. | RY, Ry, ry, ry |
| C. | Ry, Ry, Yy, ry |
| D. | Rr, RR, Yy, YY |
| Answer» B. RY, Ry, ry, ry | |
| 5609. |
When two individuals are similar in external appearance but differ in their genetic make up, they are called as [AMU 1991] |
| A. | Phenotype |
| B. | Genotype |
| C. | Homozygous |
| D. | Heterozygous |
| Answer» B. Genotype | |
| 5610. |
If a pea plant is represented by Rr, what type of information is obtained |
| A. | Phenotypic |
| B. | Genotypic |
| C. | Both (a) and (b) |
| D. | About number of chromosomes |
| Answer» C. Both (a) and (b) | |
| 5611. |
An organism's genetic constitution is called its [AMU 1990] |
| A. | Genotype |
| B. | Phenotype |
| C. | Holotype |
| D. | None of these |
| Answer» B. Phenotype | |
| 5612. |
The term "genotype'' was coined by [DPMT 1993] |
| A. | H.J. Muller |
| B. | T. Boveri |
| C. | W.S. Sutton |
| D. | W.L. Johanssen |
| Answer» E. | |
| 5613. |
The genes controlling seven traits in pea studied by Mendel were later found to be located on following number of chromosomes [BHU 1994] |
| A. | Seven |
| B. | Four |
| C. | Five |
| D. | Six |
| Answer» C. Five | |
| 5614. |
Term 'genetics' was given by [CPMT 1994] |
| A. | Mendel |
| B. | Morgen |
| C. | Bateson |
| D. | Boveri |
| Answer» D. Boveri | |
| 5615. |
How many pairs of contrasting characters in pea pod were chosen by Mendel [MP PMT 1994, 97; BVP 2003] |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 7 |
| Answer» B. 3 | |
| 5616. |
The main reason for the success of Mendel was |
| A. | Study of all the characters at the same time |
| B. | Study of one character at one time |
| C. | Study of all the plants at the same time |
| D. | Counting of plants |
| Answer» C. Study of all the plants at the same time | |
| 5617. |
Mendel is famous for his work on [CPMT 1980, 86, 88, 90, 94] |
| A. | Pisum |
| B. | Drosophila |
| C. | Neurospora |
| D. | Oenothera |
| Answer» B. Drosophila | |
| 5618. |
If an offspring shows any one of the characters of either of parents, the |
| A. | Character is said to be hereditary |
| B. | Offspring is hereditary |
| C. | The character is related with cytoplasm |
| D. | None of the above |
| Answer» B. Offspring is hereditary | |
| 5619. |
Which of the following is regarded as Drosophila of the fungal world |
| A. | Neurospora |
| B. | Aspergillus |
| C. | Mucor |
| D. | Penicillium |
| Answer» B. Aspergillus | |
| 5620. |
For obtaining hybrid ratio which characters of the plant are taken into account |
| A. | Dominant characters |
| B. | Recessive characters |
| C. | New characters |
| D. | All the above |
| Answer» E. | |
| 5621. |
The branch of botany dealing with heredity and variation is called [Bihar MDAT 1991; MP PMT 1998] |
| A. | Geobotany |
| B. | Sericulture |
| C. | Genetics |
| D. | Evolution |
| Answer» D. Evolution | |
| 5622. |
A complete set of chromosomes inherited as a unit from one parent, is known as [BHU 1980] |
| A. | Karyotype |
| B. | Gene pool |
| C. | Genome |
| D. | Genotype |
| Answer» D. Genotype | |
| 5623. |
Dominant character in tomato is |
| A. | Red fruit |
| B. | Rounded fruit |
| C. | Violet stem |
| D. | All the above |
| Answer» D. All the above | |
| 5624. |
Self sterility in "Nicotiana'' was reported by |
| A. | Morgan |
| B. | East |
| C. | Crick |
| D. | Goldberg |
| Answer» C. Crick | |
| 5625. |
Who gave first experimental evidence of the polygenic concept of inheritance |
| A. | Galton (1883) |
| B. | Malthus (1828) |
| C. | Nilsson Ehle |
| D. | None of the above |
| Answer» D. None of the above | |
| 5626. |
The colour of flower in pea is always linked with |
| A. | Cotyledons |
| B. | Pod |
| C. | Leaves |
| D. | Seed coat |
| Answer» E. | |
| 5627. |
What is true for expressing recessive characters |
| A. | They are true breeding |
| B. | They are homozygous for related trait |
| C. | They produce one type of gametes for concerning character |
| D. | All the above |
| Answer» E. | |
| 5628. |
Which one of the following operations with flowering plants would be most likely to produce the greatest number of variations in the offsprings |
| A. | Self-pollination |
| B. | Cross-pollination between a pureline and a hybrid |
| C. | Cross-pollination with another species |
| D. | Cross-pollination between two hybrids |
| Answer» D. Cross-pollination between two hybrids | |
| 5629. |
Mendel law is still true because [CPMT 1995] |
| A. | It takes place in sexually reproducing plants |
| B. | It takes place in asexually reproducing plants |
| C. | It takes place in both the above plants |
| D. | It takes place in apomictic reproducing plants |
| Answer» B. It takes place in asexually reproducing plants | |
| 5630. |
Character choosen by Mendel are located on how many chromosome [Haryana PMT 2005] |
| A. | 4 |
| B. | 14 |
| C. | 7 |
| D. | 49 |
| Answer» B. 14 | |
| 5631. |
Mendel's law of sagregation is applicable to [Wardha 2005] |
| A. | Dihybrid cross only |
| B. | Monohybrid cross only |
| C. | Both dihybrid and monohybrid cross |
| D. | Dihybrid but not monochybrid |
| Answer» D. Dihybrid but not monochybrid | |
| 5632. |
Which is the functional unit of inheritance [Haryana PMT 2005] |
| A. | Cistron |
| B. | Gene |
| C. | Chromosome |
| D. | Intron |
| Answer» C. Chromosome | |
| 5633. |
Alleles are form of [MP PMT 2005; Haryana PMT 2005] |
| A. | Genes |
| B. | Chromosomes |
| C. | DNA |
| D. | None |
| Answer» E. | |
| 5634. |
Which plant is used as a model system in the study of plant genetic [AMU 2005] |
| A. | Arabidopsis thalinia |
| B. | Pisum sativum |
| C. | Cicer arietinum |
| D. | Ocimum sanctum |
| Answer» C. Cicer arietinum | |
| 5635. |
Heterozygous purple flower is crossed with recessive white flower. The progeny has the ratio [BVP 2004] |
| A. | All purple |
| B. | All white |
| C. | 50% purple, 50% white |
| D. | 0.75 |
| Answer» D. 0.75 | |
| 5636. |
Pure tall plants are crossed with pure dwarf plants. In the \[{{F}_{1}}\] generation all plants were tall. These tall plants of \[{{F}_{1}}\] generation were selfed and the ratio of tall to dwarf plants obtained was 3 : 1. This is called [BHU 2005] |
| A. | Dominance |
| B. | Inheritance |
| C. | Co-dominance |
| D. | Heredity |
| Answer» B. Inheritance | |
| 5637. |
Which of the following has been used for genetic researches |
| A. | Pisum |
| B. | Neurospora |
| C. | E. coli |
| D. | All the above |
| Answer» E. | |
| 5638. |
Which of the following is considered as a recessive character of Mendel [Pb. PMT 2004] |
| A. | Round seed |
| B. | Wrinkled seed |
| C. | Axial flower |
| D. | Green pod |
| Answer» C. Axial flower | |
| 5639. |
If a cross is made between AA and aa, the nature of progeny will be [CPMT 2004] |
| A. | Genotypically AA, phenotypically a |
| B. | Genotypically Aa, phyenotypically a |
| C. | Genotypically Aa, phyenotypically A |
| D. | Genotypically aa, phyenotypically A |
| Answer» D. Genotypically aa, phyenotypically A | |
| 5640. |
When a tall plant with rounded seeds (TTRR) is crossed with a dwarf plant with wrinkled seeds (ttrr), the generation consists of tall plants with rounded seeds. How many types of gametes an plant would produce [CPMT 2004] |
| A. | One |
| B. | Three |
| C. | Four |
| D. | Eight |
| Answer» B. Three | |
| 5641. |
In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt. [CBSE PMT 2004] |
| A. | 75% will be tall with red fruit |
| B. | All the offspring will be tall with red fruit |
| C. | 25% will be tall with red fruit |
| D. | 50% will be tall with red fruit |
| Answer» E. | |
| 5642. |
A self-fertilizing trihybrid plant forms [CBSE PMT 2004] |
| A. | 8 different gametes and 16 different zygotes |
| B. | 8 different gametes and 32 different zygotes |
| C. | 8 different gametes and 64 different zygotes |
| D. | 4 different gametes and 16 different zygotes |
| Answer» D. 4 different gametes and 16 different zygotes | |
| 5643. |
If at a tall plant is crossed with a dwarf plant and obtained progeny is half tall and half dwarf plants. Then the genotype of progeny will be [BHU 2003] |
| A. | \[TT\times tt\] |
| B. | \[Tt\times tt\] |
| C. | \[TT\times Tt\] |
| D. | \[Tt\times Tt\] |
| Answer» C. \[TT\times Tt\] | |
| 5644. |
Hybrid vigour is induced by [CPMT 2001] |
| A. | Clonal selection |
| B. | Crossing of plant |
| C. | Crossing two plants |
| D. | Species differentiation |
| Answer» D. Species differentiation | |
| 5645. |
When a tall and red flowered individual is crossed with a dwarf and white flowered individual, phenotype in the progeny is dwarf and white. What will be the genotype of tall and red flowered individual [AFMC 2001] |
| A. | TTRR |
| B. | TtRR |
| C. | TtRr |
| D. | TTRr |
| Answer» D. TTRr | |
| 5646. |
Preformation theory concerning transmission of characters was given by |
| A. | Swamerdom |
| B. | Aristotle |
| C. | Wolf |
| D. | Pythagorous |
| Answer» B. Aristotle | |
| 5647. |
When AABB and aabb are crossed, in \[{{F}_{2}}\] generation the ratio of AaBb will be [RPMT 1997] |
| A. | 42370 |
| B. | 42401 |
| C. | 42583 |
| D. | 42461 |
| Answer» E. | |
| 5648. |
How many different types of genetically different gametes will be produced by a heterozygous plant having the genotype AABbCc [CBSE PMT 1998] |
| A. | Two |
| B. | Four |
| C. | Six |
| D. | Nine |
| Answer» C. Six | |
| 5649. |
If Mendel had studied the seven traits using a plant with 12 chromosomes instead of 14, in what way would his interpretation have been different [CBSE PMT 1998] |
| A. | He could have mapped the chromosome |
| B. | He would have discovered blending or incomplete dominance |
| C. | He would not have discovered the law of independent assortment |
| D. | He would have discovered sex linkage |
| Answer» D. He would have discovered sex linkage | |
| 5650. |
In a monohybrid cross 120 plants are obtained. The ratio of homozygous and heterozygous shall be |
| A. | 40 : 80 |
| B. | 60 : 60 |
| C. | 0.902777777777778 |
| D. | 0.493055555555556 |
| Answer» C. 0.902777777777778 | |