Advertisements
Advertisements
प्रश्न
Explain the term Alleles.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
The phenotypic ratio of incomplete dominance is ______.
A cross used to verify the unknown genotype of the F1 hybrid is a ______.
- A pure tall plant (TT) is crossed with a pure dwarf plant (tt). Draw Punnett squares to show
- F1, generation
- F2 generation.
- Give the phenotype of F2 generation.
- Give the phenotype and genotypic ratios of the F1 and F2 generations.
Name the following:
The study of heredity and variation.
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:
The physical expression of genes is called _________.
Complete the following sentence with appropriate word:
The dissimilar pairs of genes present in an individual are known as _______________.
Complete the following sentence with appropriate word:
Upon _______the diploid condition is restored.
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.
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:
Multiple choice question.
When F2 phenotypic and genotypic ratios are the same, then it is an example of _______.
The word chromosome was coined by
Hybrid is an offspring from a cross between genetically different parents.
The appearance of new combinations in the F2 generation of a dihybrid cross proves the law of ______.
An indvidual of genotype, Aa Bb Cc Dd is used in test cross. How many different phenotypes can appear in this progeny?
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 —
- Homozygous dominant and recessive parents.
- Gametes produced by both the parents.
- Gametes produced by the F, hybrid. (3)
In which region of chromosomes does crossing over take place?
A pair of corresponding chromosomes of the same shape, size and one from each parent is called ______.
