Advertisements
Advertisements
प्रश्न
What is crossing-over? What are the factors affecting it?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Differentiate Between Homozygous shows Heterozygous.
State Mendel’s Law of Dominance.
Give Technical Term:
Differences occurring within offsprings of the same progeny.
Complete the following sentence with appropriate word:
______is the hereditary unit.
Complete the following sentence with appropriate word:
In mammals, the female is homozygous while the male is _________.
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.
Write the functional activity of the following structure:
Autosomes
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?
Identify the genotype of peacock.
______ type/s of gametes is/are expected to be formed by the organism with genotype AABBCC.
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.
During a dihybrid cross with contrasting characters in the F2 generation, parental genotypes will appear in ______.
Two alternative forms of genes or alleles are located on ______.
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 |
Name any two genetic diseases in humans.
