biology Question Bank - Sarthaks eConnect

Which of the following describes correctly the homologous structures :-

What is true for Bt-toxin:-

E.coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because:-

How many type of gametas will be produced by Drosophila having following arrangement of two genes `(Y^+ & W^+)` on X-chromosomes :-

Extra nuclear genes occur in :-

Given below is the diagram related to sickle-cell anaemia, which is an autosomal recessive trait. In this identify X, Y and Z :-

In Marabilis jalapa two plants with pink flowers were hybridized. In produce in the proportion of 1 red, 2 pink and 1 white. What could be the genotype of two plants used for hybridization? Flower colour red is determined by RR and white by rr gene :-

The recent ancestors of modern man were:-

Which is an iuncorrect statement?

What would happed if vasa deferentia of man are cut?

Which of the following evidences does not favour the Lamarckian concept of acquired characters ?

Choose the correct sequence of microbes involved in biogas production?

Biogas is the mixture of gases produced by the microbial activity. The type of the gas produced depends upon :-

An autosomal character present in both sexes, but more in one sex, then such type of character is known as :-

In Mirabilis plant inheritance of leaf colour is due to plastids. If pollen grain of green branch is used to pollinated the stigma of varigated branch flower, the result is :-

Which one of following statements is not related to quantitative inheritance?

In a dihybrid cross, 2000 individuals are produced in `F_2` generation. Approximately, how many will be phenotypically different from parents?

What is aneuploidy :-

Wrong statement with respect to the female reproductive system is:

All the following statement about ZIFT are correct but one is wrong find out that –

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