40 a body cell has twice the number of chromosomes than in a gamete
Answer:a symbiotic relationship between organisms in which one of the organisms benefits and the other is harmeda symbiotic relationship between organisms in which one of the organisms benefits and the other is harmed
Explanation:
Q1. The answer is 53 chromosomes
Zebra has 44 diploid chromosomes (2n = 44). Zebra's gametes are haploid, so they will have 22 chromosomes (n = 22).
Donkey has 62 diploid chromosomes (2n = 62). Zebra's gametes are haploid, so they will have 31 chromosomes (n = 31).
After fusion of zebra's gamete (n = 22) and donkey's gamete (n = 31), the zonkey's zygote will have 22 + 31 = 53 chromosomes
Q2 and Q3. In the meiosis, the number of chromosomes is reduced by half. Since zonkey has 53 chromosomes, after meiosis it should have 53/2 chromosomes, which is not the whole number. This is the reason why they cannot produce normal gametes that will result, after the fusion, in the production of normal diploid zygote
Answer:
Vegetative propagation is the process of multiplication in which a portion of fragment of plant body functions as propagate and develops into a new individual.
Explanation:
- Asexual or vegetative propagation of plant is that form of plant propagation in which the new individual arises from any vegetative part of the parent and possesses exactly the same characteristic of the parent plant.
- Vegetative propagation can be carried out through roots as in <em>Dalbergia sissoo</em> (Shisham) ; <em>Psidium guajava</em> (Guava) etc; through stems as in <em>Solanum tuberosum</em> (potato) ; through leaves as in<em> Bryophyllum</em>.
- Plants can be propagated artificially by following natural principle.
- Some artificial methods of vegetative propagation include, Cutting, grafting, budding etc.
The answer is (D), because none of the other answers make sense
