Genetics: What you should know

The basic unit of inheritance is the Gene. A gene is a length of DNA on a chromosome that does something particular for an organism. A gene can come in more than one form. These flavors of genes are called Alleles. An allele represents one or more DNA sequences in a gene that produces a particular phenotypic result. There isn't necessarily a one to one mapping between mutations to the DNA sequence of a gene and different alleles for that gene. Alleles are just broad variants of a gene that can produce different results.

Genes come in two copies per individual.

The different alleles of a gene may be dominant and recessive with respect to each other.

It is rare that an aspect of an organism will be controlled by a single gene that has just two alleles. Heredity is seldom this simple. Most real world phenotypes are produced by complex interactions between sets of genes.

In other words, no matter how hard you may try to select a donor based on particular physical characteristics that you wish to replicate, there is no guarantee! Your baby will be your baby. You will love your baby just as he or she is.