I did how people inherit height Every daughter has exactly 50% of their chromosomal DNA coming from each parent. Every boy has very close to 50%, altered only by inheriting an X from their mother and a Y from their father. The X chromosome, being much larger than the Y, has more DNA, so a son has very slightly more DNA from their mothers, though this is not generally considered significant. There is also some DNA that is not on chromosomes, but carried in an organelle within the cells called the mitochondria, mtDNA. Both sons and daughters exclusively carry their mothers' mtDNA, as it comes from the ova that was fertilised to create them. The sperm have very few mitochondria, and even those that make it into the ova are destroyed after conception, so paternal mtDNA is not passed on to offspring.
I did how people inherit height Aptly called GIANT, for the International Genetic Investigation of Anthropometric Traits, the trial involves more than 700,000 people who provided samples for DNA analysis. Preliminary findings included nearly 700 genetic sequences that people of different heights had in common: the most common genetic variants linked with height.
I did how people inherit height Scientists estimate that about 80 percent of an individual’s height is determined by the DNA sequence variants they have inherited, but which genes these variants are in and what they do to affect height are only partially understood. Some rare gene mutations have dramatic effects on height (for example, variants in the FGFR3 gene cause achondroplasia, a rare condition characterized by short stature). For most individuals, though, height is controlled largely by a combination of genetic variants that each have more modest effects on height, plus a smaller contribution from environmental factors (such as nutrition). More than 700 such gene variants have been discovered and many more are expected to be identified. Some of these variants are in genes that directly or indirectly affect cartilage in growth plates, which are areas in the long bones of the legs and arms where new bone is produced, lengthening the bones as children grow. The function of many other height-associated genes remains unknown.