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प्रश्न
What is a gene? How is it related to heredity?
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उत्तर
Genes are hereditary units located on a chromosomal thread. A gene can be defined as the “ultimate unit of recombination, mutation, and self-reproduction”. They are responsible for various characteristics externally shown by the plants and animals. A single gene may affect one or more characteristics of offsprings.
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संबंधित प्रश्न
Differentiate Between Homozygous shows Heterozygous.
Explain the Term Heredity.
Name the following:
The genetic composition of an organism.
Give Technical Term:
The individuals having dissimilar pairs of genes.
Complete the following sentence with appropriate word:
The dissimilar pairs of genes present in an individual are known as _______________.
Multiple Choice Question
Genetics is a branch of biology dealing with:
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.
In a dihybrid cross, F2 generation offsprings show four different phenotypes while the genotypes are _______.
Which one of the following is back cross?
What is allelomorph?
Each gamete has only one allele of a gene.
Which one of the following genotype will yield only one type of gamete?
A normal visioned woman whose father is colourblind married a normal visioned man. What are the probabilities of her sons or daughters to be colourblind? Explain with the help of Punnett square.
Parents of blood group i and AB cannot have a child of blood group AB because ______.
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 |
An indvidual of genotype, Aa Bb Cc Dd is used in test cross. How many different phenotypes can appear in this progeny?
A pair of corresponding chromosomes of the same shape, size and one from each parent is called ______.
Rewrite the correct form of the statement by changing the first or last word only:
The full complement of DNA of an organism is termed as genetics.
