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
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....
Molecular genetics helps us understand how genes are structured, function, and regulated at the molecular level. It provides insight into how variations in genes can lead to differences in traits and diseases. By studying the interaction between genes and proteins, molecular genetics contributes to our understanding of gene expression, inheritance, and evolution.
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).
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.
=== === 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 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".
Genetically, a carrier is someone who is carrying a defective allele but doesn't display any of it's characteristics. For example: If a male (with chromosomes X and Y) has a dud X chromosome, he will undoubtedly show the characteristic that come with it. However, if a female (with chromosomes X and X) has the defective X chromosome, the symptoms will not be displayed due to the other, intact X chromosome. (assuming that the characteristic is recessive and not dominant) The female is a Carrier A carrier refers to someone who has a recessive gene that is not expressed (heterozygous). Such a trait is only expressed when an individual has two recessive genes (homozygous recessive). In humans, the gene for albinism is recessive. Any of us with normal pigmentation may be carriers for this trait. Parents who are both carriers will have a 1 in 4 chance of havibg an albino child. Genes (alleles) do not have to be "defective " to illustrate carriers. People with hitch-hiker's thumb are homozygous recessive. People with straight thumbs may be carriers (heterozygous) or have two dominant genes. "Carrier" can also refer to a molecule which transfers an ion or functional group to another molecule, e.g. NADP is a hydrogen ion carrier, Coenzyme A is an acetate carrier.