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प्रश्न
What is crossing-over? What are the factors affecting it?
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उत्तर
Crossing-over is the interchange of the parts of the chromatid of a pair of chromosomes. High temperature, X-rays and radiation treatment are the factors affecting crossing-over.
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संबंधित प्रश्न
Explain the Term Dominance.
Explain the Term Crossing-over.
Give Technical Term:
Cell organelle directly involved in genetics.
Give Technical Term:
Transmits characteristics from parents to offsprings.
Give Technical Term:
A twin consisting of a brother and a sister were born to a lady. What is the name of such a type of twins?
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Most genetic diseases in man are recessive in character.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Mendel experimented upon plants of Oryza sativa.
Multiple Choice Question
When an individual has both the genes of a contrasting character, it is said to be:
Explain a dihybrid cross with suitable example and checker board method.
Explain test cross with suitable example and state its ratios.
Enlist dominant and recessive characters in pea plant with respect to the position of flower, colour of seed and colour of a pod in tabulated form.
Using ______, the production of gametes by the parents, the formation of zygotes, the F1 and F2 plants can be understood.
Identify the possible genotypic ratio in F2 generation if a plant producing red flowers (RR) is crossed with another plant of the same species that produces white flower (rr).
A normal visioned woman whose father is colourblind married a normal visioned man. What are the probabilities of her sons or daughters to be colourblind? Explain with the help of Punnett square.
Which one of the following character is recessive in case of a pea plant?
Name any two genetic diseases in humans.
