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It is a simple square - shaped diagram which is drawn to show the possible combinations of male and female gametes of `F_(1)` - parents

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Punnett square
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Given below is a pedigree chart of a family with five children. It shows the inheritance of attached ear lobes as opposed to the free ones. The squares represent the male indiones. The squares represent the male individuals and circles the female individuals Which of one of the following conclusions drawn is correct?

Consider the following statements. (i)In Gynandropsis, Passiflora , etc., thalamus is elongated and shows well developed nodes and internodes. (ii)The floral buds in Agave, Allium , etc. , may sometimes get modified into vegetative buds or bulbils. (iii)Sepals are concerned with protection of flowers in bud condition and petals help to attract insects for pollination. (iv)Stamens and carpels serve as the male and female reproductive organs respectively. Which of the following combinations of above statements provides an evidence that flower is a modified shoot ?

A diagram used to explain the production of gametes by the parents, the formation of zygotes and the F_(1) and F_(2) - generations

Refer to the following figures regarding division bryophyta. (i). 'A' are the androcyte mother cells of the antheridium, which give rise to a large number of biflagellate male gametes. (ii). 'B' is the autheridial chamber and 'C' is multicellular stalk of antheridium. (iii). 'D' and 'E' respectively represents venter canal cells and neck canal cell of the femal sex organ. (iv). 'F' is the egg cell of the archegonium, which usually possesses severatl female gameters. Which of the following combinations of above statements is incorrect?

Assertion : When yelow bodied, white eyed Drosophila females were hybridised with brown-bodied, red eyeed males , and F_(1) progeny was intercrossed, F_(2) ratio deviated from 9:3:3:1 Reason : When two genes in a dihybrid are on same chromosome, the proportion of parental gene combinations are much higher than the non-parental type

In a dihybrid cross, white-eyed, yellow -bodied female Drosophila was crossed with red-eyed, brown - bodied male Drosophila, produced in F_(2) - generation are 1.3% recombinants and 98.7% progeny with parental type combinations. This observation of Morgan deviated from Mendelian F_(2) - phenotypic dihybrid ratio. Explain giving reasons, Morgan's observations

5 cells each of e.m.f 1.5 V and internal resistance 0.1 Omega are connected in such a manner that the current in an external resistor of 10 Omega is maximum. Draw the circuit diagram of the combination and calculate the current in the circuit.

Which of the following statements are correct regarding surgical methods of contraception ? (i) These are generally advised to the male/female partner as a terminal method to prevent any more pregnancies (ii) Surgical procedure in male is called tubectomy and that in the female, vasectomy (iii) Reversibility is easily possible (iv) They block gamete transport and thereby prevent conception.

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ARIHANT PUBLICATION-HEREDITY AND VARIATION-PART-I-Questions for Practice (Very Short Answer Type Questions ) Express in one or two word(s)
  1. Define the genetic make up or gene complement of an organism

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  2. It is a simple square - shaped diagram which is drawn to show the po...

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