Which of the following statements is true in humans?

There are 100 - 200 different cell types.

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The gene count is 30,000 to 40,000 in them.

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There are 10 billion base pairs.

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Both A and B are correct.

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Solution

The correct option is C Both A and B are correct.
There are around 200 cell types in human body. According to human genome project, there are 30,000-40,000 genes in the human genome. The word genome refers to sum total of genes present in entire organism thus 30,000-40,000 genes per cell. The human genome has approximately 3 billion base pairs. The female gamete contribute cytoplasm to the developing embryo. Therefore, mitochondrial DNA show the maternal effect and follow maternal inheritance, not paternal. Option A and B are correct.

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Similar questions

Correct the following statements if there is any mistake.

(a) The four nitrogenous bases in the DNA are Guanine, Thiamine, Adrenaline and Cytosine.

(b) Genes are specific sequences of bases on a chromosome.

(d) Nucleosomes are groups of cysteine molecules surrounded by DNA strands.

(e) If there are 46 chromosomes in a cell, there will be 23 chromatin fibres inside the nucleus during interphase.

i. There are three types of meristematic tissues based on the region they are present in.
ii. These tissues directly produce differentiated cells.

Q. Which of the following statements is/are true about the different types of corals?

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