How is child affected if it has grown from the zygote formed by an XX-egg fertilized by a Y-carrying sperm ? What do you call this abnormality.

(a) Why is haemophilia generally observed in human males? Explain the conditions under which a human female can be haemophilic. (b) A pregnant human female was advised to undergo MTP. It was diagnosed by her doctor that the foetus she is carrying has developed from a zygote formed by an XX-egg fertilized by Y-carrying sperm. Why was she advised to undergo MTP?

The process in which haploid embryo is formed from haploid egg without fertilization is called :

A coil is wound on an iron core and looped back on itself so that the core has two sets of clsely wound wires in series carrying current in opposite senses. What do you expect about its self inductance? Will it be large or small?

(a) What do you call the area of an ovum from where the sperm makes its entry? (b) Name the enzyme produced by the sperm to facilitate its entry.

Most chickens reach maturity and begin laying eggs at around 20 weeks of age. From this point forward, however, as the chicken ages,its eges its egg production decreases. A farmer was given a flock of 100 chickens (all of which were the same age) and asked to meaure daily egg output for the entire flock at random intervals starting at maturity until the chickens were 70 weeks old. The data are recorded in the scatteplot below and the line of best fit has been drawn. How many times did the farmer's data differ by more than 5 eggs from the number of eggs predicted by the line of best fit ?

Which of these plants is correctly matched with its reproductive characteristics ? (i) Sphagnum : Male sex organ called antheridium produce biflagellate antherozoids while the female sex organ called archesporium produces a single egg . (ii) sequoia : One of the megaspores enclosed within the megasporangium develops into a multicellular female gametophyte that bears two or more archegonia or female sex organs (iii) Wolffia : one of the male gametes fuses with the egg cell to from a zygote while the other male gamete fuses with the diploid secondary nucleus to produce the triploid primary endosperm nuclelus . (iv) polysiphonia . Sexual reproduction is oogamous with non-motile gametes and accompanied by complex post-fertilization developments

How do you prepare your own herbarium sheets? What are the different tools you carry with you while collecting plants for the preparation of a harbarium? What information should a preserved plant meterial on the herbarium sheet provide for taxonomical studies?

How long does it take form marigold, rice, wheat, coconut, mango plants to come to flower? In some plants, where flowering occur more than once, what would you call the inter-flowering period-juvenile or mature ?

Two ideal gas thermometer A and B use oxygen and hydrogen respectively . The following observations are made: Temperature, Pressure therometer A, Pressure therometer B Triple point of water, 1.250xx10^(5)Pa , 0.200xx10^(5)Pa Normal melting point of sulphur, 1.797xx10^(5)Pa , 0.287xx10^(5)Pa (a) What is the absolute temperature of normal melting point of sulphur as read by thermometers A and B ? (b) What do you think is the reason for the slightly different answers from A and B ? (The thermometers are not faulty). what further procedure is needed in the experiment to reduce the discrepancy between the two readings.