Reproduction is necessary for living things because it enables them to create offspring and continue their population. Through reproduction, they pass on their genetic information to the next generation. This ensures that their species continues to exist on Earth.Know More
By reproducing, new living things are created. There are two methods for reproduction. Sexual reproduction involves two members of a species, typically a male and female, whereas asexual reproduction enables a living thing to reproduce without the need for another organism. Most living things reproduce either sexually or asexually, although there are a few rare species that are capable of reproducing through both methods.
In sexual reproduction, two parents reproduce and contribute a gamete, which is a reproductive cell that contains a haploid, which is a single set of chromosomes. The offspring is produced from a combination of genes inherited from both parents. Half of the genetic material of the offspring comes from each gamete. Humans and most other animals reproduce this way.
In asexual reproduction, a single parent cell produces genetically identical offspring. Living things that reproduce asexually do not need to receive cells from another living thing. A single parent provides all chromosomes, which is why the offspring is identical in genetic structure. Bacteria, yeast and molds are some species that reproduce asexually.Learn more about Biology
Lamarck's theory of evolution differs from Darwin's in its premise that adaptations appear when needed in response to the environment and the acquired traits are then passed on to offspring. Genetic research, however, has shown that living organisms cannot alter their genetic material as needed. Darwin's theory differs from Lamarck's by describing evolution as a consequence of the environment instead of a response to it.Full Answer >
Mendel's law of independent assortment states that the genes for different traits are passed to offspring separately. In Mendel's original experiments with pea plants, this meant that plants with heterozygous genes for two different traits would pass the alleles for each gene separately.Full Answer >
The concept of natural selection states that competition for limited resources among a species with varying traits results in a winner and a loser, with the winner having a greater opportunity to survive and breed offspring with like traits. Over time the advantageous traits become predominant in the species.Full Answer >
A Punnett square is used to make predictions about the likelihood of certain traits occurring in offspring based on the genetics of the parents. This mathematical tool was invented by English geneticist Reginald Punnett in the early 20th century.Full Answer >