Science Fill in the blank

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Genes always work in _________.

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Most people have________ earlobes but some have________ earlobes.

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The_______ chromosomes for a______ are XX whereas that for a______are XY.

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The human forelimb and bat’s forelimb are an example of ________ organs whereas an insect’s wing and a bat’s wing are an example of _______ organs.

Fill in the following blanks with suitable words: The scientific name of all human beings is ________ .

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All races of man have ______ blood groups.

Fill in the following blanks with suitable words:A human gamete contains________ chromosomes whereas a normal body cell has _________ chromosomes in it.

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Broccoli has evolved from _____ by the process of artificial selection.

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In pea plants, the gene for dwarfness is _________ whereas that for tallness is __________.

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The theory of natural selection for evolution was proposed by _____.

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The evolution of eye is an example of evolution by ________ .