Answer:
recombination and independent segregation of chromosomes during meiosis
Explanation:
Recombination and independent segregation of chromosomes represent the two most important meiotic mechanisms by which sisters from the same parents can inherit different gene variants and therefore look very different from each other:
1- Independent assortment (segregation) of chromosomes: during meiosis, homologous chromosomes are randomly distributed in daughter cells (which will give rise to the gametes), and therefore separate independently of each other. It is for that reason that gametes have unique combinations of chromosomes, which increases genetic variation.
2- Recombination, also known as crossing over, refers to the exchange of chromosome segments between non-sister chromatids during meiosis. This mechanism is well-known to produce new gene variants (alleles) in the daughter cells. In consequence, recombination also increases the genetic variation of the resulting gametes that will produce offspring (in this case, different sisters).
Answer:
Ultrasound scan to rule out polyps or endometrial hyperplasia of the uterus
Explanation:
Answer:
Transport Across Membranes
Transport Without Energy.
Osmosis.
Explanation:
Transport Across Membranes. If a cell were a house, the plasma membrane would be walls with windows and doors. Moving...
Transport Without Energy. Passive transport occurs when substances cross the plasma membrane without any input of energy...
Osmosis. Osmosis is a specific type of diffusion; it is the passage of water from a region of high water concentration...
Summary. Controlling the movement of things in and out of the cell is an important role of the plasma membrane.
Answer:it is C
Explanation:i took the quiz
In all organic molecules, all carbon atoms always have four covalent bonds. organic compounds, carbon atoms are most likely to bond with hydrogen, oxygen, nitrogen, sulfur, and halogens such as chlorine. Hydrogen with one valence electron forms a single covalent bond.
