Example of Non-Mendelian disorder:
Example of Non-Mendelian disorder:
- Cystic fibrosis
- Haemophilia
- Down’s syndrome
- Thalassemia
The Correct Option is C
Solution and Explanation
Down's syndrome is caused by the presence of an extra copy of chromosome 21, known as trisomy 21. It is not inherited in a Mendelian pattern, which typically involves the transmission of a single gene from parents to offspring. Instead, Down's syndrome occurs due to a random error during the formation of reproductive cells or early embryonic development.
Top Questions on Non-Mendelian Genetics
- Total genetic content of an organism is called
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- Broad palm with single palm crease is visible in a person suffering from
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- The recombination frequency between the genes a & c is 5%, b & c is 15%, b & d is 9%, a & b is 20%, c & d is 24% and a & d is 29%. What will be the sequence of these genes on a linear chromosome?
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Match List - I with List - II.
List - I
List-II
(a) Adaptive radiation (i) Selection of resistant varieties due to excessive use of herbicides and pesticides (b) Convergent evolution (ii) Bones of forelimbs in Man and Whale (c) Divergent evolution (iii) Wings of Butterfly and Bird (d) Evolution by anthropogenic action (iv) Darwin Finches List - I List - II Choose the correct answer from the options given below.
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- Non-Mendelian Genetics
- A specific recognition sequence identified by endonucleases to make cuts at specific positions within the DNA is
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Questions Asked in KCET exam
- The speed of sound in an ideal gas at a given temperature T is v. The rms speed of gas molecules at that temperature is vrms. The ratio of the velocities v and vrms for helium and oxygen gases are X and X' respectively. Then \(\frac{X}{X'}\) is equal to
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- Thermodynamics
- If \(p(\frac{1}{q}+\frac{1}{r}),q(\frac{1}{r}+\frac{1}{p}),r(\frac{1}{p}+\frac{1}{q})\) are in A.P., then p, q, r
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- Arithmetic Progression
- A stretched wire of a material whose Young's modulus Y = 2 × 1011 Nm-2 has Poisson's ratio of 0.25. Its lateral strain εl = 10-3. The elastic energy density of the wire is
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- mechanical properties of solids
- A metallic rod of length 1 m held along east-west direction is allowed to fall down freely. Given horizontal component of earth’s magnetic field BH = 3 × 10-5 T. The emf induced in the rod at an instant t = 2s after it is released is ( Take g = 10 ms-2 )
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- A 60 W source emits monochromatic light of wavelength 662.5 nm. The number of photons emitted per second is
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- Quantum Physics
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”.