Why are there the same number of boys and girls?

The first theory is an evolutionary one which says that in order to have an equal number of males and female in adulthood, there have to be slightly more males born. Males are more likely than females to die in childhood and at all stages of life – from accidents, taking risks, suicide and from health problems.

Which sperm reaches the egg faster male or female?

It’s all about a race to the egg… Shettles found male sperm to be smaller, would swim faster and have a shorter life span than the female sperm. He believed that if a couple had sex around the time of ovulation the male sperm would be more likely to reach the egg before the female sperm.

Are all species 50/50 male female?

The sex ratio gives the proportion of males to females in a population. In most species, the sex ratio at the zygote stage is about 50:50. At first sight, the 50:50 sex ratio might seem inefficient. Most species do not have parental care and are not monogamous; a male can fertilize several females.

Are men and women equal in terms of intelligence?

In terms of intelligence, men and women are equal in that the average IQ of all males is equal to the average IQ of all females. There is a difference in how these equal intelligences are arrived at however. .

What is the probability of having a male and female child?

The probability that any given child will be male (or female) is exactly 50\%. This is because of how reproduction works in humans. Male and female sex cells are formed by a process called meiosis, where the diploid chromosomes divide and separate.

What is the difference between male and female sex cells?

Male and female sex cells are formed by a process called meiosis, where the diploid chromosomes divide and separate. Normal cells have 46 chromosomes in 23 pairs. Sex cells have 23 individual chromosomes. For a woman, all of her cells will contain the X chromosome, as all of her cells have a double-X pair.

What is the ratio of male to female births?

So the probability of the sex of the child, which is determined by whether they get an X or a Y chromosome from their biological father, is exactly 50:50. And so the ratio of male to female births is also 50:50.