•Sex cells are also called gametes
•embryos develop on the lining of the uterus
•the ovaries produce the eggs
•the process of developing and releasing eggs is called the menstrual cycle
•once a sperm cell enters an egg cell no other sperm cell can enter
•the gender of the child depends on the sperm cell
Answer:
a person or thing that prevents incompatible or antagonistic people or things from coming into contact with or harming each other:
Explanation:
Answer:
So how big is just one gigatonne? This unit of mass is equivalent to one billion metric tons, 2.2 trillion pounds, or 10,000 fully-loaded U.S. aircraft carriers. Central Park is 4 kilometers long and 0.8 kilometers wide. A gigatonne of ice placed here would extend 341 meters (1,119 feet) high.
Explanation:
hope this helps...
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).
