A nutritionally wild type organism, which does not require any additional growth supplement is known as
Holotype
Auxotroph
Prototroph
Phenotype
The Correct Option is B
Solution and Explanation
A prototroph is an organism that doesn't need any extra growth supplements and is nutritionally self-sufficient. It can manufacture all its essential components like amino acids, nucleic acids, vitamins, and other cellular elements from basic inorganic nutrients. In contrast, auxotrophs are mutant strains that lack specific enzymes necessary for processing nutrients, and they can only thrive when provided with supplemented growth media.
Top Questions on Principles of Inheritance and Variation
- A normal couple produces half the sons as haemophilic and half the daughters as carriers. Choose the option that correctly indicates the chromosome on which the gene for this trait is located.
- CBSE CLASS XII - 2025
- Biology
- Principles of Inheritance and Variation
Answer the following questions with respect to the sex determining mechanism observed in honey bee.
- [(a)] Name the type of sex determination system observed in honey bee.
- [(b)] Fill in the blanks (i), (ii) and (iii) in the given question.
- [(c)] What will be the sex and chromosome number of the progeny formed from the unfertilised eggs of honey bee?
- CBSE CLASS XII - 2025
- Biology
- Principles of Inheritance and Variation
- What are chromosomal disorders? Describe Turner's syndrome and Klinefelter's syndrome.
- Maharashtra Class XII - 2025
- Biology
- Principles of Inheritance and Variation
- What are the reasons for the success of Mendel?
- Maharashtra Class XII - 2025
- Biology
- Principles of Inheritance and Variation
- What is the genotype of Drosophila showing normal wings?
- MHT CET - 2025
- Biology
- Principles of Inheritance and Variation
Questions Asked in NEET exam
- A body weighs 48 N on the surface of the earth. The gravitational force experienced by the body due to the earth at a height equal to one-third the radius of the earth from its surface is:
- NEET (UG) - 2025
- Gravitational potential energy
A bob of heavy mass \(m\) is suspended by a light string of length \(l\). The bob is given a horizontal velocity \(v_0\) as shown in figure. If the string gets slack at some point P making an angle \( \theta \) from the horizontal, the ratio of the speed \(v\) of the bob at point P to its initial speed \(v_0\) is :
- NEET (UG) - 2025
- Pendulums
- An oxygen cylinder of volume 30 litre has 18.20 moles of oxygen. After some oxygen is withdrawn from the cylinder, its gauge pressure drops to 11 atmospheric pressure at temperature \(27^\circ\)C. The mass of the oxygen withdrawn from the cylinder is nearly equal to: [Given, \(R = \frac{100}{12} \text{ J mol}^{-1} \text{K}^{-1}\), and molecular mass of \(O_2 = 32 \text{ g/mol}\), 1 atm pressure = \(1.01 \times 10^5 \text{ N/m}^2\)]
- NEET (UG) - 2025
- Ideal-gas equation and absolute temperature
- A uniform rod of mass 20 kg and length 5 m leans against a smooth vertical wall making an angle of \(60^\circ\) with it. The other end rests on a rough horizontal floor. The friction force that the floor exerts on the rod is (take \(g = 10\) m/s\(^2\)):
- NEET (UG) - 2025
- Common forces in mechanics
- A wire of resistance \(R\) is cut into 8 equal pieces. From these pieces, two equivalent resistances are made by adding four of these together in parallel. Then these two are added in series. The net effective resistance of the combination is:
- NEET (UG) - 2025
- Resistance
Concepts Used:
Non-Mendelian Genetics
The term - non-mendelian inheritance refers to any pattern of heredity in which features do not separate according to Mendel's laws. These principles describe how features linked with single genes on chromosomes in the nucleus are passed down through generations.
Types of Non-Mendelian Inheritance
Codominance Inheritance
It is a form of incomplete dominance in which both alleles for the same feature are expressed in the heterozygote at the same time. For example, the MN blood types of humans.
Incomplete Dominance
In a heterozygote, the dominant allele does not always completely cover the phenotypic expression of the recessive gene, resulting in an intermediate phenotype which is referred to as "incomplete dominance”.