The reduction in chromosome number occurs during <u>meiosis I.</u>
Chromosomes are long molecules of DNA that contain some or all of an organism's genetic material. In most chromosomes, very long, thin strands of DNA are coated with packaging proteins. In eukaryotic cells, the histones are the most important of these proteins.
Within the nucleus of all cells, DNA molecules are packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly wrapped many times around proteins called histones that support its structure.
Another type of cell division, meiosis, ensures that humans have the same number of chromosomes from generation to generation. This is a two-step process in which the number of chromosomes is halved from 46 to 23 to form sperm and eggs.
Learn more about chromosomes here:-brainly.com/question/11912112
#SPJ4
Answer:
rough ER → ER-to-Golgi transport vesicles → Golgi cisternae → secretory or transport vesicles → cell surface (exocytosis)
Explanation:
Proteins go through the secretory pathway.
This structure encapsulates the pituitary gland to aid in protection and diffusion of releasing hormones from the anterior pituitar is Sella Turcica.
Sella Turcica it is very important during embryological development , mainly help in migration of Neural crest cell to frontonasal . This neural crest help in development of teeth and Sella Turcica
What is Neural crest cell ?
- A multipotent and migrating cell population called neural crest cells (NCCs) helps the developing embryo generate a variety of tissues. A group of disorders and illnesses called as neurocristopathies are caused by flaws in the growth, differentiation, and migration of NCCs.
- Found in ectoderm in the margin of the neural tube
- Contribute in the formation of a plethora of different tissues and organs
- Its includes melanocytes, bone of smooth muscle
To learn more about Neural crest cell visit :brainly.com/question/13962148
#SPJ4
It is very difficult to conduct research on the shark's role in the ecosystem so scientists aren't sure what would happen if sharks became extinct. ... If the whale shark becomes extinct, there might be an increase in plankton. However, plankton are also eaten by several species of whale. I THINK THTAS THE BRAINLISET
