मराठी

Explain the Term Alleles.

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प्रश्न

Explain the term Alleles.

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उत्तर

Alleles: Alleles are the alternative forms of the same gene. For example, tallness and dwarfism are the two alternative forms of a gene for height and are called alleles. Similarly, attached ear lobes and free ear lobes are alleles for the type of ear lobes.

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पाठ 3: Principles of Genetics - Exercises [पृष्ठ ४२]

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फ्रँक Biology Part 2 [English] Class 10 ICSE
पाठ 3 Principles of Genetics
Exercises | Q 51. | पृष्ठ ४२

संबंधित प्रश्‍न

Who was the ‘Father of Genetics’?

 Give the significance of mutation.


Explain the Term Heredity.


Explain the Term Variation.


Complete the following sentence with appropriate word:

______is the hereditary unit.


Complete the following sentence with appropriate word:

The small differences among individuals are called ________.


Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

Genes are responsible for genetic characters.


Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:

A female is responsible for the sex of the progeny.


Write the functional activity of the following structure:

Genes


Choose the Odd One Out


Multiple Choice Question

A cross was made between tall and dwarf plants. In F1 generation all plants were tall, when the F1 plants were selfed, the tall and dwarf plants appeared in a 3 : 1 ratio in the F2 generation. This phenomenon is known as:


Explain test cross with suitable example and state its ratios.


The appearance of new combinations in the F2 generation of a dihybrid cross proves the law of ______.


During a dihybrid cross with contrasting characters in the F2 generation, parental genotypes will appear in ______.


How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?


A typical dihybrid cross is carried outbetween true breeding plant with yellowround seeds and a true breeding plant withgreen wrinkled seeds. With appropriatesymbol write the genotypes of —

  1. Homozygous dominant and recessive parents.
  2. Gametes produced by both the parents.
  3. Gametes produced by the F, hybrid. (3)

Define the following term:

Gene


Name any two genetic diseases in humans.


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