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प्रश्न
What is crossing-over? What are the factors affecting it?
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उत्तर
Crossing-over is the interchange of the parts of the chromatid of a pair of chromosomes. High temperature, X-rays and radiation treatment are the factors affecting crossing-over.
संबंधित प्रश्न
A cross used to verify the unknown genotype of the F1 hybrid is a ______.
Give the Phenotype of the F2 generation.
Explain the Term Heredity.
Explain the Term Mutation.
Explain the Term Recessive character.
Give Technical Term:
Transmits characteristics from parents to offsprings.
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?
Complete the following sentence with appropriate word:
The physical expression of genes is called _________.
Complete the following sentence with appropriate word:
Upon _______the diploid condition is restored.
Multiple Choice Question
Genetics is a branch of biology dealing with:
Multiple Choice Question
When an individual has both the genes of a contrasting character, it is said to be:
Multiple choice question.
Phenotypic ratio of incomplete dominance in Mirabilis jalapa.
State whether the following is true or false.
Hybrid is an offspring from a cross between genetically different parents.
______ type/s of gametes is/are expected to be formed by the organism with genotype AABBCC.
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?
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.
