Why Is Understanding Heredity Important

Understanding heredity is important because heredity is why you look the way you do. If you dont understand it then you wont know why you look that way. Here let me break it down for you. Organisms get there traits from their dads sperm and their moms egg. The egg and sperm each carry 23 chromosomes . Each chromosome holds a peice of DNA. Each peice of DNA is a gene. Genes gives you your traits. Each Gene pairs up. One from your mom and one from your dad. Genes can be dominant (strong) or recessive (weak).
WOW thats a lot to know about heredity but if you know what it is then it should be easy to know and undestand why you look the way you do.The British mathematician/biologist R.C. Punnett devised a method of picturing this concept on a graph called a Punnett Square. Punnett Squares graph the father’s genotype (the genetic information concerned with a specific trait: for example, two alleles for tall, or two for short, or one for each) crossed with the mother’s. Punnett Squares show the probability of having children who have a certain trait.
Dominant alleles are shown by a capital letter.
Recessive alleles are shown by the lowercase of the same letter.
This graph is a cross between a mother who is a hybrid or heterozygous for tall (meaning she has one allele (T) for tallness and one (t) for shortness). Physically she is tall because T is dominant and masks the shortness genes from the father. Half of their offspring will therefore be short (tt) and half will be tall hybrids (Tt; a pure tall offspring would be TT). This means that the parents have a 2/4 or 50% chance of having tall children and a 2/4 or 50% chance of having short children. This is a 1:1 ratio.

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