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A genetic trait which is present but unseen in an individual is called a trait?
Wiki User
∙ 14y ago
Recessive
For example, brown eyes (B) are dominant, blue eyes (b) are recessive.
BB = brown
Bb = brown
bb = blue
In the Bb genotype, the blue eyed gene is present, but the brown eyed gene is dominant, and show as the phenotype
Wiki User
∙ 12y ago
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What is the difference between a genotype ratio and a phenotype ratio?
The genotype is the actual code for a trait. Hidden on the chromosome we can never actually see the alleles controlling the trait unless we sequence the DNA. The phenotype is the result of at least two alleles expressing a visible or measurable trait in an individual. A genotype to phenotype ratio is the correspondence between the unseen code of the individual's alleles and the detectable quality of the individual's trait. This ratio relates the proportional quantities of unseen and seen, a comparison between the encoded trait and the expressed result of the code.
How are you going to pass microbiology?
By studying, I would hope. Microbiology is a course based solely on the unseen, it really pays to have hands on experience with microscopes, agar plates, and other tests to see it in action. A solid background in biology will help you pass a course on microbiology, but expect to learn a lot more in detail about things like mitosis, cell walls, protein formation, cellular respiration, and more.
What is the difference between phenotypes and genotypes?
Genotype are the unseen differences in genetic combinations of an individual. Phenotypes are the expressed and seen differences of an individual.A genotype is the genetic makeup of an organism with reference to a single trait, set of traits, or an entire complex of trait; that is, genotype is the type of genes you have. A phenotype is the physical characteristic of an organism. So the genotype decides the genetics and inherited traits of an organism, but phenotypes refer to the actual display of these traits. Genotypes are decided by inherited genes, while phenotypes are determined by the effect of environmental factors as well. The more complex a biological process, the more is the effect of environmental factors on it and therefore the chances of a predominant phenotype.For example, say recessive allele t codes for albinism (a congenital disorder) and dominant allele T is normal. Two individuals have different genotypes: TT and Tt. Because they both have an allele T, neither have albinism; therefore, they have different genotypes but the same phenotype. An individual with a genotype tt would have albinism and would therefore have a different phenotype than the previous two.Another example: Identical twins have the same genes and the same genotype. Every now and then a gene in one of the twins will be expressed differently from the gene in the other twin. They will have different phenotypes. So phenotype is a fancy word used when a gene works one way under certain conditions and a different way under other conditions.An easy way to remember that (from what I've learned from my science teacher) is to think "Pheno" as "Photo", like if you take a picture, you'll only be able to see the outside of somebody; what they look like..In more detail:Take alleles R and r. If R and R display a "complete dominance" relationship, then RR , Rr, and rr are different genotypes, but two are the same phenotype. RR and Rr display the same trait because R is completelycovering up r's trait, but rr will show the recessive trait.EX: A flower with R as a red trait and r as a white trait has the following phenotypes for each genotype:RR: redRr: redrr: whiteAdditional information:If R and r display a "codominance" relationship, then RR, Rr, and rr are different genotypes and phenotypes. RR shows the dominant trait, while rr shows the recessive trait. Rr shows a combination of the two, as if the two were dominating cooperatively.EX: A flower with R as a red trait and r as a white trait has the following phenotypes for each genotype:RR: redRr: red and whiterr: whiteIf R and r display a "incomplete dominance" or "incomplete inheritance" relationship, then RR, Rr, and rr are different genotypes and phenotypes. RR shows the dominant trait, while rr shows the recessive trait. Rr shows when R incompletely dominates r, allowing some of its qualities show. EX: A flower with R as a red trait and r as a white trait has the following phenotypes for each genotype:RR: redRr: pinkrr: white
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You must understand that people in the 1800's had no idea that microbes existed. They didn't know that things could be transmitted by these small unseen things. Dysentery was caused by bacteria, virus, or an amoeba as it is now. People often had blood in the stool and frequent watery stools. They could lose as much as a liter of fluid a day. More than 80,000 Union soldiers died of this during the civil war. Parts of the Kapok tree is used in areas where it grows. About the only treatment then was water replacement and ingestion of clay. Today clay is found as kaolin and is in medicines for very loose stools.
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Due to prescence of green pigments (chlorophyl) leaves of plants appear gree to us.Because they abosorb the sun light having wave lengt of about 510 nm. This light has green color therefore they look like green.
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because genetics is still a relatively new science. we are however able to catch some genetic disorder before they become obvious. However mucking about with the genetics of the unborn is fraught with as yet unseen and ethical dangers.
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