(a) double fertilisation
(b) self pollination
(c) cross fertilisation
(d) no fertilisation
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1. the number of ways in the squares of 8x8 chess board can be painted red or blue so that each 2x2 square has two red and two blue squares is
Solution: For an m×n chessboard there are 2m+2n−2 ways. Case I. There are two horizontally adjacent squares of the same color: 2m−2 ways. Case II. There are two vertically adjacent squares of the same color: 2n−2 ways. Case III. None of the...
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In a bisexual flower of the young stamens being removed, the flower produces fruit. Provide a suitable explanation .
The pistil is intact. Cross pollination has occurred leading to fertilisation and formation of fruit.
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A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because
(a) tallness is the dominant trait
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A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers.
(c) The genetic make-up of the tall parent can be depicted as TtWW Since all the progeny bore violet flowers, it means that the tall plant having violet flowers has...
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A study found that children with light - coloured eyes are likely to have parents with light coloured eyes.
In this study, a light-coloured eye is a dominant trait because children born from parents having light-coloured eyes also had light-coloured eyes.
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What is a bisexual flower? Collect five bisexual flowers from your neighbourhood and with the help of your teacher find out
A flower that contains both the male and female reproductive structure (stamen and pistil) is called a bisexual flower. Examples of plants bearing bisexual flowers are: Water lily ( Nymphaea odorata) Rose...
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What are chasmogamous flowers? Can cross-pollination occur in cleistogamous flowers? Give reasons for your answer.
There are two types of flowers present in plants namely Oxalis and Viola − chasmogamous and cleistogamous flowers. Chasmogamous flowers have exposed anthers and stigmata similar to the flowers of other...
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A progeny of F1, is crossed with the homozygous recessive parent. What is this cross called? Work out how is it useful?
When a progeny of F1 is crossed with the homozygous recessive parent, it is called test cross. Such a cross is useful to determine the genotype of an unknown i.e.,...
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In monohybrid cross of red and white flower, Mendel got only red flower. On setting the F1 plants having red flower
On crossing red and white flower only red colour flower appeared in the F1 generation. But the white colour flower again appear in the F2 generation which is raised out...
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A bag contains 5 white balls and 7 red balls. If 5 balls are drawn at random, the probability that 3 balls are red and the rest are white.
The answer is 175/396
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