Chromosomes contain DNA molecules highly packaged and wound around histone proteins. Each chromosome has two chromatids joined together at a point called centromere. Crossover is a process that take place during meiosis 1 ( first phase of meiosis), it enhances the exchange of genetic material. During cross over the non-sister chromatids of chromosomes fuse at chiasma where exchange of genetic material takes place.Therefore, it will be correct to say that crossover creates sister chromatids that are different, because non-homologous sister chromosomes have swapped genetic material with one another.
DNA replicates itself, so no, unlike what it may seem, parent organisms do not loose their DNA. Before the fecundation process, a cool process similar to miosis happens, it is called meiosis. During meiosis the parent chromosome will duplicate it self and break down each of its 46 chromosomes into 4 different new formed cells, which will become the sperm and egg cells. Each of these egg or sperm cells will be different from eachother, which is how you get siblings that don't look alike, however they will contain a copy of the parent's genetic information.
In conclusion;
In the creation of offspring, the copy of the parent's DNA breaks apart into 4 different pieces which will form sperm or egg cells.
Answer:
The correct option is Blood cells are produced in bone marrow.
Explanation:
Skeletal system can be described as the system which comprises of all the bones and joints of an organism. The main function of the skeleton system is to provide support and protection to the organism.
The circulatory system can be described as a system which comprises of the heart, blood vessels and blood. This system is mainly involved in the transportation of substances like oxygen, nutrients etc in the body.
The skeletal system interacts with many other systems of the body and helps them perform their functions. For example, the skeletal system interacts with the muscular system so that a muscle can contract and relax.
The skeletal system interacts with the circulatory system by producing blood cells in the bone marrow. Red blood cells, as well as white blood cells, are produced by this process.
Answer:
Vains because that's how blood flow?
Explanation: