Answer:
Polytene chromosomes may be defined as the giant chromosomes that contain alternate dark and light bands when view under the microscope. These chromosomes are found in the salivary gland of Drosophila.
These glands are functionally highly active and contain thousand of DNA strands. These chromosomes are aligned parallel with each other as the replication is normal but the cells are unable to separate and fails to undergo the process of cytokinesis.
Answer: (edited) actually B
Explanation: EMF, or electromagnetic conduction, is the production of voltage in a coil caused by the change in a magnetic flux through a coil.
Answer:
- double membraned nucleus;
- i.cell wall and large permanent vacuole
Explanation:
nucleus of eukaryotic cell sarronded by double membrane in which its internal structure,bear genetic materials in chromosomes, in prokaryotic cell genetic materials exist independently in a circle DNA has nuclear material not surrounded by a double membrane.
(a) anaphase of mitosis, 96 chromosomes, 96 chromatides
(b) anaphase i of meiosis, 48 chromosomes, 96 chromatides
(c) anaphase ii of meiosis, 48 chromosomes, 48 chromatides
(d) g 1 prior to mitosis, 48 chromosomes, 48 chromatides
(e) g 2 prior to mitosis, 48 chromosomes, 96 chromatides
(f) g 1 prior to meiosis i, 48 chromosomes,48 chromatides
(g) prophase of meiosis I – 48 chromosomes, 96 chromatides
Answer:
Sexual reproduction produces offspring which are distinct from the parent.This strategy is successful because this reproduction increases genetic variation, which entailsthe odds of some progeny, which are suited to new and challenging conditions.
Explanation:
Sexual reproduction produces genetic variability, as two nucleic unites to produce a new offspring this allows the fungus to adapt to new environments. Sexual reproduction in the fungi consists of three sequential stages plasmogamy, karyogamy, and meiosis.
It involves diploid chromosomes pulled into two daughter cells, each containing an haploid set of chromosome.
Plasmogamy is the fusion of two protoplasts which brings together two compatible haploid nuclei this nuclear types are present in the same cell, but are not yet fused. Karyogamy then leads to the fusion of the haploid nuclei and the formation of a diploid nucleus. The new cell formed by karyogamy is the zygote.
