Fill in the following blanks with suitable words :

(C) Most people have ........... earlobes but some have.......... earlobes.

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Solution

Most people have free earlobes but some have attached earlobes.

Free earlobes are the most common form of earlobes in humans. This type of earlobe is often large and hangs below the point of attachment to the head. The free earlobe is the influence of a dominant allele.

The attached earlobe are not very common.
Earlobes of such type are small and directly attached to the side of the head. It is a recessive trait.

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Fill in the following blanks with suitable words :

(a) Genes always work in ............ .

(b) In pea plants , the gene for dwarfness is ........... whereas that for tallness is ............. .

(d) A human gamete contains ........ chromosomes whereas a normal body cell has ....... chromosomes in it.

(e) All races of man have ...... blood groups.

(f) The ....... chromosomes for a ........ are XX whereas that for a .......... are XY.

Q. Fill in the following blanks with suitable words :
(a) Genes always work in ................ .
(b) In pea plants, the gene for dwarfness is ..............whereas that for tallness is ............ .
(c) Most people have ............earlobes but some have ............earlobes.
(d) A human gamete contains.............. chromosomes whereas a normal body cell has .......... chromosomes in it.
(e) All races of man have...........blood groups.
(f) The...............chromosomes for a ............are XX whereas that for a ..............are XY.

Q. Fill in the following blanks with suitable words:
(a) Having two eyes gives a ................field of view.
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Unattached earlobes is dominant to attached earlobes. Two parents, both with unattached earlobes, had a child with attached earlobes. What are the chances that their next child will have attached earlobes?

Q. Do birds have earlobes?

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Introduction to Genetics

Standard X Biology

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Fill in the following blanks with suitable words : (C) Most people have ........... earlobes but some have.......... earlobes.

Fill in the following blanks with suitable words :

(C) Most people have ........... earlobes but some have.......... earlobes.