Answer:
Chromosome 21 in figure D is the result of a process known as non-disjunction
Explanation:
Meiosis is the process of cell division that serves to obtain gametes, cells with exactly half the chromosome load of the species. This process involves the equal distribution of chromosomes in each daughter cell.
Non-disjunction is an alteration in the separation of the sister chromatids during meiosis, resulting in a gamete with non-separated sister chromatids, which when joined to a normal gamete can produce an organism with an extra chromosome.
In the karyotype shown in the photo, the non-disjunction in chromosome 21 produces a trisomy, a type of aneuploidy seen in Down syndrome.
Learn more:
Trisomy brainly.com/question/484286
The correct option is C.
Pilli is a long protein filament which attach reproducing cells together during conjugation. This attachment allows the cells to exchange the genetic materials, that is, plasmid between them.
Out of the following given choices;
a.phenothiazines and butyrophenones<span>
b. tricyclics and MAOIs
c. nitrates and glucocorticoids
d. benzodiazepines and antihistamines</span>
The answer is a. butyrophenones work by inhibiting dopamine-mediated
neuro-transmitters hence altering the normal thought pattern of its patients.
They are more anti-dopamine (and less
anti-adrenergic, anti-histaminic and anti-cholinergic) than phenothiazine but work in the same pharmacological
way.
Answer: About 24 chromosomes
Explanation: A male grasshopper has 23 chromosomes in each somatic cell and a female has 24 chromosomes in each somatic cell.
A cellular organelle is a structure in the cell that performs a specific function.
Nucleus - stores cell's DNA; DNA replication occurs here
Ribosome - produce protein; "factories" of the cell
Mitochondria - breaks down food for energy to be used by the cell; "powerhouse" of the cell
Vacuole - store materials such as food, water, sugar, minerals, and waste products
Endoplasmic reticulum - carry materials throughout the cell; "transport system"
