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प्रश्न
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उत्तर
Mendel's work did not receive much notice till 1900. Then three scientists: Hugo de Vries, Carl Correns and Erich von Tschermak working independently rediscovered his work and brought Mendel's experiment to limelight.
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संबंधित प्रश्न
What is a gene? How is it related to heredity?
Give the significance of mutation.
Mutation alerts the hereditary material. Give reasons.
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:
Most genetic diseases in man are recessive in character.
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.
Multiple Choice Question
When an individual has both the genes of a contrasting character, it is said to be:
Which one of the following is back cross?
A recessive factor is altered by the presence of a dominant factor.
Each gamete has only one allele of a gene.
In a dihybrid cross with contrasting characters, the number of different genotypes obtained in F2 generation are ______.
Alleles refer to ____________.
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.
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?
Mendel was successful in his experiments because:
Define the following term:
Gene
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.
