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Which one from those given below is the period for Mendel's hybridization experiments?
The term "linkage" was coined by?
In animal kingdom, along with XX-YY mechanism, many other variants of chromosomal sex determination mechanisms have been described such as XX-XO mechanism, ZZ-ZW mechanism, ZZ-ZO mechanism and haplo-diploidy mechanism, which are present respectively in:
Among the following characters, which one was not considered by Mendel in his experiments on pea?
With what velocity a ball be projected vertically so that the distance covered by it in 5th second is twice the distance it covers in its 6th second ($g=10 \text{ m/s}^2$)?
$CH_2OH \cdot CH_2OH$ (Ethylene glycol) on heating with periodic acid gives:
Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains an ideal gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. The process is:
Two genes R and Y are located very close on the chromosomal linkage map of the maize plant. When RRYY and rryy genotypes are hybridized, then F2 segregation will show:
How many true-breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a plant with the genotype:
Mongolian idiocy (an obsolete term) is due to trisomy in the 21st chromosome. This condition is called:
Minor change in a gene's structure is called:
Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?
Genera like Selaginella and Salvinia produce two kinds of spores. Such plants are known as
A stone dropped from a building of height $h$ reaches the earth after $t$ seconds. From the same building, if two stones are thrown (one upwards and other downwards) with the same velocity $u$ and they reach the earth surface after $t_1$ and $t_2$ seconds respectively, then:
Sound waves travel at $350 \text{ m/s}$ through warm air and at $3500 \text{ m/s}$ through brass. The wavelength of a $700 \text{ Hz}$ acoustic wave as it enters brass from warm air:
A pleiotropic gene:
Lack of independent assortment of two genes A and B in the fruit fly Drosophila is due to:
When a cluster of genes shows linkage behaviour they:
A car accelerates from rest at a constant rate $\alpha$ for some time, after which it decelerates at a constant rate $\beta$ and comes to rest. If the total time elapsed is $t$, then the maximum velocity acquired by the car is: