In most cells (viruses are an exception) DNA codes for protein and mRNA. Some viruses contain RNA which in turn codes for DNA and proteins, although I do not think they would be called units of heredity.
An allele. For example, if mom is heterozygous for green eyes, but has blue eyes, let's call that Ee (allele). If dad is homozygous for blue eyes, let's call that EE (allele). E=blue eyes and e=green eyes. E is dominant and e is recessive, or blue eyes are dominant and green eyes are recessive. Using a Punnet Square model, the offspring will have a 100% chance of blue eyes. The genotypes within the Punnet Square would EE and Ee. There would be only one phenotype: blue eyes. If both parents carried the e, or green eyes gene, though, there would be a 75% chance of the offspring having blue eyes and a 25% chance of the offspring having green eyes. The genotypes within the Punnet Square would be EE, Ee, and ee. The phenotypes would be blue eyes and green eyes. Hope this wordy answer helped!
itron
The segments of DNA that code for a functional product (protein) are called genes.
gene (I think...) The units of a chromosome that code for traits are genes.
genes
Three base units of DNA are called a Codon. A series of codons code for a protein.
Not at all. Genes are. Everyone produces the same hormones but everyone has a unique genetic code
expressed
expressed
Activated.
Activated.
Heredity is the inborn factors which affect development. The mechanism of heredity is DNA. DNA is partially made up of pairs of "steps" called bases. Bases make up our genetic code. Chromosomes are coils of DNA, which are made up of small segments called genes.
itron
genes
The segments of DNA that code for a functional product (protein) are called genes.
heredity genetic code
gene (I think...) The units of a chromosome that code for traits are genes.
genes