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प्रश्न
Answer the following question.
Some Mendelian crossing experimental results were shown to the students. Teacher informed that there are two genes located on the same chromosome. He enquired if they will be ever separated from each other?
उत्तर
- Genes are located on chromosomes at specific distances and positions.
- The greater this distance, the greater the chance that a crossover can occur between the genes and the greater the chances of recombination.
- The chances of recombination are less between the genes that are placed closed to each other on the chromosome.
- Therefore, due to recombination, the two genes located on the same chromosome have the possibility of separating from each other.
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संबंधित प्रश्न
Discuss with your teacher about haploid insects and lower plants where cell-division occurs.
Discuss with your teacher about some haploid cells in higher plants where cell-division does not occur.
Choose the correct option.
How many chromatides are present in anaphase-I of meiosis-I of a diploid cell having 20 chromosomes?
Choose the correct option.
Find incorrect statement.
Answer the following question.
Students were shown some slides of cancerous cells. Teacher made a comment as if there would have been control at one of its cell cycle phase, there wouldn’t have been a condition like this. Which phase the teacher was referring to?
Match the following column A with column B.
| Column-A (phases) |
Column-B (Their events) |
| a. Leptotene | 1. Crossing over |
| b. Zygotene | 2. Desynapsis |
| c. Pachytene | 3. Synapsis |
| d. Diplotene | 4. Bouquet stage |
In meiosis crossing over is initiated at ______.
Colchicine prevents the mitosis of the cells at which of the following stage______.
The paring of homologous chromosomes on meiosis is known as ______.
Write about Pachytene and Diplotene of Prophase I
