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प्रश्न
Occasionally, a single gene may express more than one effect. The phenomenon is called ______.
विकल्प
pleiotropy
mosaicism
polygeny
multiple allelism
independent assortment
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उत्तर
Occasionally, a single gene may express more than one effect. The phenomenon is called pleiotropy.
Explanation:
Pleiotropy is the phenomenon where a single gene influences more than one distinct trait or effect. For example, in pea plants, a single gene can affect flower color, seed coat color, and the color of the leaf axil. In humans, the sickle cell anemia gene affects not only red blood cell shape but also causes symptoms like anemia and vessel blockage. This shows how one gene can have multiple effects on an organism’s phenotype.
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संबंधित प्रश्न
Distance between the genes and percentage of recombination shows ______.
Discuss why Drosophila has been used extensively for genetical studies.
What is recombination? Discuss the applications of recombination from the point of view of genetic engineering.
The physical association of two or more genes located on the same chromosome, due to which they tend to be inherited together and do not assort independently, is called:
The process by which new non-parental combinations of genes are produced due to the exchange of genetic material between homologous chromosomes during meiosis is called:
Thomas Hunt Morgan conducted his experiments on linkage using which organism?
In Morgan's initial cross, red-eyed females (XR XR) were crossed with white-eyed males (Xr Y). What observation did Morgan make in the F₂ generation?
How does linkage relate to Mendel's Law of Independent Assortment?
In Morgan's dihybrid crosses with Drosophila, the F₂ ratio deviated from the expected 9:3:3:1 ratio. Which genes were being studied in these crosses?
If two genes show a recombination frequency of 1.3%, which of the following statements is most accurate?
According to Morgan's data, genes showing 37.2% recombination (such as white and miniature wing genes) are classified as:
Which scientist, a student of Morgan, used recombination frequency to measure gene distances and create chromosome maps?
Crossing over during meiosis can separate linked genes. This process demonstrates that:
Morgan's experiments with Drosophila demonstrated that genes are physically located on chromosomes by showing:
