Because they come from the same egg, identical twins are always the same sex according to the National Health Service. Fraternal twins are from two separate eggs, which means that they can be different sexes.
Identical twins are developed from the same egg, which splits after it is fertilized. The two resulting embryos have the exact same genes. A woman is more likely to have twins if she has a history of twins in her family, although many identical twins are random.
Fraternal twins, on the other hand, are often hereditary. They are developed when two eggs are released and fertilized during the same menstrual cycle. They have no more similar characteristics than siblings, so they do not share exactly the same genes and often do not look alike.
The number of twins born across the world has increased significantly in the past several decades because of an increased use in fertility drugs.Learn More
Urine odor is related to the level of concentration of waste products contained in the urine. Highly concentrated urine may have strong odors, especially of ammonia, according to Mayo Clinic.Full Answer >
The three subphylums in Chordata are Vertebrata, Urochordata and Cephalochordata. Vertebrata is the largest group, including such familiar animals as fish, birds, reptiles, amphibians and mammals. Urochordata contains about 4,600 to 5,100 species total, and Cephalochordata contains only 28.Full Answer >
The ninhydrin test is a colorimetric test for amines, particularly alpha-amino acids, carboxylic acids and free amino acids on simple or complex proteins. It uses the crystalline compound ninhydrin, which has the chemical name triketohydrindene hydrate, or 1,2,3-indantrione monohydrate.Full Answer >
Chlorophyll’s function in plants is to absorb light and transfer it through the plant during photosynthesis. The chlorophyll in a plant is found on the thylakoids in the chloroplasts.Full Answer >