Recessive doesn't really describe the expression of a gene. When a gene is "expressed" a protein is made. Recessive describes what form of the gene is expressed or in other words, which allele. A recessive protein may look different and function differently than a dominant protein. This is oversimplified though because there are many different interactions and mechanisms that determine protein function.
nice
Punnett squares demonstrate the percentage of traits that are passed on from one generation to the next. It shows the pairings of dominant and recessive genes and what percentage there is of the next generation having those particular traits.
mendel is known as the father of genetics. he figured out how genes work using pea plants. he figured out how dominent, recessive genes work. he also figured out how genotypes and phenotypes work.
You forgot to tell us what the expression is. That's kind of important.
Don't give us the options then!! If one parent had 2 dominant genes then all offspring would have dominant phenotype, the same goes for both parents having dominant genes.
For a start you tell us what the expression equals....
The building blocks of our genes (that make us what we are) are called alleles and these can be either dominant, recessive or codominant - which means they are equally dominant. Now for your sentence: "A typical example of codominance can be found in blood types, where the existence of A as well as B alleles in a person will lead to blood type AB".
All of us have genes
Scientists search for genes because knowledge on our genetics can cure diseases. It could also tell us about how we might evolve in the future, and how we evolved in the past. This research could provide gene therapy (altering genes) and choosing what you're child will be like (also by altering genes).
=== === If you have green eyes and your husband has brown eyes the brown eyes will be more dominent but it is still possible for the child to have green eyes (but less likely)... Darker colours more dominent as opposed to lighter colours being more recessive etc. === ===
The Human Genome is able to tell us the actual genetic codes for thymine, guanine, adenine, and cytosine. Scientist are now able to control the way diseases are developed. The Human Genome does not tell us why genes mutate to cause disorders or diseases.
Similarities in amino acid sequences tell us the the genes coding for these proteins are similar. Similar genes are due to shared ancestry ie the organisms have evolved from a common ancestor in the past. Differences in amino acid sequence tell us that mutations have occurred in the genes since the organisms separated from the common ancestor. The bigger the differences, the longer the organisms have been separated.