Heterozygosity is most favoured in plants following
Options
(a) cleistogamy (b) autogamy (c) xenogamy (d) geitonogamy
Correct Answer:
xenogamy
Explanation:
Geitonogamy is a type of pollination in which pollen grains of one flower […]
How many chromosomes are there in endosperm cell of Zea mays?
Options
(a) forty (b) twenty (c) thirty (d) ten
Correct Answer:
thirty
Explanation:
Endosperm is triploid in maize. In maize, 2n=10. So, […]
How many of the daughter cells obtained from a megaspore mother cell result in the matured ovum?
Options
(a) four (b) three (c) two (d) one
Correct Answer:
one
Explanation:
The megaspore mother […]
If diploid number of chromosomes in a plant is 40, then the number of chromosomes in a gamete will be
Options
(a) 40 (b) 30 (c) 20 (d) 10
Correct Answer:
20
Explanation: […]
If pollen of a flower falls on the stigma of another flower, belonging to the same plant, it is called
Options
(a) geitonogamy (b) herkogamy (c) cleistogamy (d) autogamy
Correct Answer:
geitonogamy
Explanation: […]
If the cell of root in wheat plant have 42 chromosomes then the number of chromosome in the cells of pollen grain
Options
(a) 14 (b) 28 (c) 21 (d) 42
Correct Answer: […]
If there are 4 cells in anthers, what will the number of pollen grains?
Options
(a) 4 (b) 12 (c) 8 (d) 16
Correct Answer:
16
Explanation:
In anthers, meiosis occurs and each […]
In a monoecious plant
Options
(a) male and female sex organs are on different individuals (b) male and female gametes are of two morphologically distinct types (c) male and female sex organs are […]
In a population of species, in some plants the style is shorter. But in some others, it is longer than the stamens. This condition is called
Options
(a) heterostyly (b) homogamy (c) homostyly […]
In angiosperms each microspore mother cell undergoing meiosis gives rise to a
Options
(a) diad (b) triad (c) tetrad (d) four diploid cells
Correct Answer:
tetrad
Explanation:
No explanation available. Be the first […]
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