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Explain the Term Alleles. - Biology

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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 2: Fundamentals of Genetics - Explain the Terms

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आईसीएसई Biology [English] Class 10
पाठ 2 Fundamentals of Genetics
Explain the Terms | Q 10

संबंधित प्रश्‍न

A cross used to verify the unknown genotype of the F1 hybrid is a ______.


Who was Mendel?

What is crossing-over? What are the factors affecting it?


Explain the Term Heredity.


Explain the Term Variation.


Explain the Term Genotype.


Give Technical Term:

A virus with DNA as heredity material.


Give Technical Term:

A single egg was fertilized by a single sperm. But twins derived from that egg were born. What is the name of such type of twins?


Give Technical Term:

A twin consisting of a brother and a sister were born to a lady. What is the name of such a type of twins?


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 ________.


Complete the following sentence with appropriate word:

The dissimilar pairs of genes present in an individual are known as _______________.


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

DNA has a double-helical structure.


Multiple Choice Question

Genetics is a branch of biology dealing with:


Multiple choice question.

A cross between an individual with an unknown genotype for a trait with recessive plant for that trait is _______.


Multiple choice question.

When F2 phenotypic and genotypic ratios are the same, then it is an example of _______.


Each gamete has only one allele of a gene.


Identify the possible genotypic ratio in F2 generation if a plant producing red flowers (RR) is crossed with another plant of the same species that produces white flower (rr).


Two alternative forms of genes or alleles are located on ______.


Match the items given in Column I with those listed in Column II. Choose the answer with correct combination of alphabets of the two columns.

Column I Column II
A. Monohybrid cross 1. T and t
B. Test cross 2. TT
C. Alleles 3. TT × tt
D. Homozygous tall 4. tt
  5. Tt × tt

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