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When is crossed with then the ratio of hybrid for all the three genes is
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Important Questions on Principles of Inheritance and Variation
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Which of the following characteristics of Drosophila is not suitable for genetical studies?
(a) They could be grown on a simple synthetic medium in a laboratory.
(b) They complete their life cycle in about two weeks.
(c) Single mating produces a few numbers of progeny flies.
(d) They have many types of hereditary variations that can be seen with a low-power microscope.
(e) Male and Female flies are not easily distinguishable.
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is a/an recessive trait that can be transmitted from parents to the offspring when both the parents are .
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Read the following statements:
(a) Genes are the units of inheritance.
(b) Gene contains the information that is required to express a particular trait in an organism.
(c) Gene which codes for a pair of contrasting traits is are known as alleles.
(d) Mendel called gene as 'factors'.
Pick up the incorrect statement:
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R is the dominant red flower trait while r is the recessive white flower trait. A heterozygous red-flowered plant is crossed with the homozygous red-flowered plant. offspring are produced. The number of white-flowered plants is:
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Heterozygous tall plant is selfed. It produces both tall and dwarf plants. This confirms Mendel's law
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In Mirabilis jalapa, RR, Rr and rr determine red, pink and white colour respectively.When F1 hybrid of RR and rr was crossed with a dominant parent, the ratio produced is:-
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Dihybrid test cross ratio is
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is
