A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as
(a) TTWW
(b) TTww
(c) TtWW
(d) TtWw
(c) TtWW
According to the law of dominance, Mendel showed that the one allele is dominant over the another one (expressed allele is known as dominant allele or unexpressed one is recessive). As shown in this question, the all progeny bears violet flowers but half of them are short, this means that the violet colour flowers are dominant and the dwarf flower which contains white flower is a recessive trait.
Popular Questions of Class 10 Science
- Q:-
When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.
- Q:-
Outline a project which aims to find the dominant coat colour in dogs.
- Q:-
Draw the structure for the following compounds.
(i) Ethanoic acid (ii) Bromopentane*
(iii) Butanone (iv) Hexanal.*Are structural isomers possible for bromopentane?
- Q:-
A hot plate of an electric oven connected to a 220 V line has two resistance coils A and B, each of 24 Ω resistance, which may be used separately, in series, or in parallel. What are the currents in the three cases?
- Q:-
How is the sex of the child determined in human beings?
- Q:-
(a) What property do all elements in the same column of the Periodic Table as boron have in common?
(b) What property do all elements in the same column of the Periodic Table as fluorine have in common? - Q:-
Calculate the number of electrons constituting one coulomb of charge.
- Q:-
What is an homologous series? Explain with an example.
- Q:-
Why is variation beneficial to the species but not necessarily for the individual?
- Q:-
A man with blood group A marries a woman with blood group O and their daughter has blood group O. Is this information enough to tell you which of the traits – blood group A or O – is dominant? Why or why not?
Recently Viewed Questions of Class 10 Science
- Q:-
Imagine that you are sitting in a chamber with your back to one wall. An electron beam, moving horizontally from back wall towards the front wall, is deflected by a strong magnetic field to your right side. What is the direction of magnetic field?
- Q:-
Draw a labelled diagram of the longitudinal section of a flower.
- Q:-
What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs?
- Q:-
Which of the following methods is suitable for preventing an iron frying pan from rusting?
(a) Applying grease
(b) Applying paint
(c) Applying a coating of zinc
(d) All of the above. - Q:-
Plaster of Paris should be stored in a moisture-proof container. Explain why?
- Q:-
An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be –
(a) 100 W (b) 75 W (c) 50 W (d) 25 W
- Q:-
Compute the heat generated while transferring 96000 coulomb of charge in one hour through a potential difference of 50 V.
- Q:-
What is a neutralisation reaction? Give two examples.
- Q:-
Let the resistance of an electrical component remains constant while the potential difference across the two ends of the component decreases to half of its former value. What change will occur in the current through it?
- Q:-
On what basis would you classify energy sources as
(a) renewable and non-renewable?
(b) exhaustible and inexhaustible?Are the options given in (a) and (b) the same?
- NCERT Chapter