The importance of Reproduction
Survival of a species depends on it's reproductive success. The reproductive success is the passing of genes through a species. Adaptation is the success of a mutation in a species or a change. Without reproduction , extinction & overpopulation would occur. It is needed because it helps to balance the environment so the animals/species can live there. There are two types of reproduction; asexual & sexual. Asexual involves one parent while sexual involves two. If the reproductive process does not involve meiosis it is known to be asexual. Asexual reproduction replicates the DNA of the parents which creates two identical clones. Binary Fission (the replication of DNA followed by cell division), Budding (offspring branches and grows from the parent), Vegetative propagation (the growth of multiple plants from one parent organism), fragmentation (piece of an organism forms a new organism) are four examples of asexual reproduction, just to name a few. The disadvantages of asexual reproduction is that there is no genetic variability- clones environmental factor that kills one can kill all. Sexual reproduction is when chromosomes of the two parents are combined and they create a unique offspring through meiosis & fertilization. Sexual reproduction is common in mammals, birds, and some other animals like dogs & cats.
Mitosis vS. meIosis
Meiosis is the cell division that results in 4 haploid cells (gametes). In females meiosis is happening in the ovaries in males it is happening in the testes. For females meiosis starts before birth & then every month we get our menstrual cycle. For males meiosis starts when males hit puberty. Meiosis happens for a variety of reasons, they creat haploid cells, which is half of the chromosome cells (23).in other words, Meiosis is when a specialized diploid cell splits in half twice, producing four separate cells, each of which is genetically distinct from each other. Meiosis goes through the same stages as mitosis, (prophase, metaphase, anaphase, and telophase) but goes through them twice "II"
Mitosis replicates a cell with a complete set of 46 chromosomes into two daughter cells that are each identical to each other. All of our body cells contain the same mix of DNA, 46 chromosomes grouped into 23 pairs, one in each pair, one from your mom, and one from you dad. They are called homologous chromosome pairs. Mitosis goes through 4 scientific stages; prophase, metaphase, anaphase, and telophase. Prophase is when the chromosomes appear, nucleus dissolves, and spindle fiber forms. Metaphase is when the chromosomes line up in the middle for equal distribution to the daughter cells, as spindle fibers attach to the centromeres of each chromosome pair. Anaphase is when the chromotids divide/separate. Telophase is when two new cells are formed.
Mitosis replicates a cell with a complete set of 46 chromosomes into two daughter cells that are each identical to each other. All of our body cells contain the same mix of DNA, 46 chromosomes grouped into 23 pairs, one in each pair, one from your mom, and one from you dad. They are called homologous chromosome pairs. Mitosis goes through 4 scientific stages; prophase, metaphase, anaphase, and telophase. Prophase is when the chromosomes appear, nucleus dissolves, and spindle fiber forms. Metaphase is when the chromosomes line up in the middle for equal distribution to the daughter cells, as spindle fibers attach to the centromeres of each chromosome pair. Anaphase is when the chromotids divide/separate. Telophase is when two new cells are formed.
Reproduction of the florida crayfish
Florida Crayfishes reproduce sexually. When crayfish mate the male crayfish has to be in the right form (shaped like a genopod). Sometimes molting can change there for . If they are not in the right form they will get angry and start to tear apart the females limbs. Mating goes on for about a half an hour. The eggs are already inside the female but has to be mature enough before it is extracted. It can be days or months before the eggs come out. The eggs are extracted and fertilized on the way out and is carefully attach to the swimmerets. The sperm from the male that is now inside the female will be stored inside them know as a "sperm-plug". [1]