Studies show that first borns are taller than later borns in subsequent order. Study-Birth order progressively affects childhood height. Yes there is genetic variation and some younger siblings may be taller than the first, but the majority are not as tall as the first born.
A boy inherits height about equally from both mother and father. Statistically, the average adult height of a boy will be the average of the Father's height and the Mother's Height + 5 inches. So, the average boy will be taller than his father if his mother is less than 5 inches shorter than the father.
Firstborn children are taller compared to those born subsequently, and this height advantage increases sharply over the higher order of birth of siblings.
On average, firstborn children are one inch taller than the next born children and have an IQ score of three points higher.
The genetics of height
As a general rule of thumb, your height can be predicted based on how tall your parents are. If they are tall or short, then your own height is said to end up somewhere based on the average heights between your two parents. Genes aren't the sole predictor of a person's height.
We inherit a set of 23 chromosomes from our mothers and another set of 23 from our fathers. One of those pairs are the chromosomes that determine the biological sex of a child – girls have an XX pair and boys have an XY pair, with very rare exceptions in certain disorders.
In addition to genetic and biological determinants, height is also influenced by environmental factors, including a mother's nutrition during pregnancy, whether she smoked, and her exposure to hazardous substances.
13-year-old Brendan Adams is over 7 foot tall and is thought to be the tallest child in the world. He has a very rare genetic condition which also makes his joints swollen - walking is very painful.
Those with several older brothers are most affected, the study finds. Medical records show that by the age of 10, such children are already significantly shorter than the average. Those born last appear to grow up in an environment where parents are more stretched for time, money and the ability to lavish attention.
First-born kids tend to be leaders, like CEOS and founders, and are more likely to achieve traditional success. Middle-born children often embody a mix of the traits of older and younger siblings, and they're very relationship-focused.
Results: First-borns were taller than later-borns (P < 0·0001), even when adjusted for parents' heights (0·31 vs 0·03 SDS; P = 0·001).
But a statistical study of centenarians by researchers at the University of Chicago has found some other potential predictors of extreme longevity. Women and men who were the first born in large families, the study found, were two to three times more likely to make it to 100 than later-born children.
Constitutional delay in growth and puberty (A child is short during most of childhood but will have late onset of puberty and end up in the typical height range as an adult because the child will have more time to grow.)
However, this has raised concerns in the minds of several individuals. This includes people who may be described as short and those who may have wondered if it were possible. Just as simple as the question is, so is its answer. Yes, short parents can have tall children.
All men inherit a Y chromosome from their father, which means all traits that are only found on the Y chromosome come from dad, not mom. The Supporting Evidence: Y-linked traits follow a clear paternal lineage.
Maternal height influences offspring linear growth over the growing period. These influences likely include genetic and non-genetic factors, including nutrition-related intergenerational influences on growth that prevent the attainment of genetic height potential in low- and middle-income countries.
Medium gap (two to four years)
With this gap, you'll have the lowest risk of having preterm birth and a low birth weight baby (Zhu, 2005).
You've probably heard it before and brushed it off if you're a second, third or fourth+ child - but it's true: the eldest sibling is the smartest, according to research. And there's not just one reason for it. Apparently, there are a few.
A 2-Year Age Gap
Sibling rivalry is strongest during these years and parents are often already struggling with a toddler who is developing a strong sense of identity and loves to use the word “No!” On the upside, a 2 year age gap works out pretty well as the kids get older.
The mother's womb is stretched after her first pregnancy, allowing it to accomodate slightly larger children afterwards.
No. Both your parents may carry recessive "shortness" genes, and if the "shortness" genes from both parents are combined in you, you're going to be short because neither parent has contributed a dominant "tallness" gene. Can I be 6+ foot tall even if my parents are short?
In a family of four children, the siblings were 2.5cm shorter than average, according to the study. Further analysis revealed that the youngest was most affected. The study found that while having older siblings of either sex affected a younger child's development, the effect of older sisters was more mild.
Unlike nuclear DNA, which comes from both parents, mitochondrial DNA comes only from the mother.
Not every daughter. Some are, though. If the mother is below average height, the daughter is more likely to be taller than her, because the most likely heights for her daughter are closer to the average. But if the mother is above average height, the daughter is more likely to be shorter than her.