Dimples are a very cute facial muscle deformity that results in an indentation in the cheek. With dominant phenotype, you may have a dimple on one side, or both. The main pigment is melanin, and the more melanin, the darker the color.
Simple inheritance means the phenotype results from the influence of a single gene. While the genotype is the genetic makeup of the organism, the phenotype is the expression of the gene. Pigmented iris: If a person is homozygous recessive for eye color, there is no pigment in the front part of the eyes, and the blue color of the back of the iris shows through, giving blue eyes.
A thumb was outstretched in the circle of sixth-graders. It had a most peculiar shape, being relatively thin and normal near the base, and then suddenly capped off with a bulbous, short tip, reminiscent of a slightly flattened pearl onion. The thumb belonged to year old me.
Greig cephalopolysyndactyly syndrome is a disorder that affects development of the limbs, head, and face. The features of this syndrome are highly variable, ranging from very mild to severe. People with this condition typically have one or more extra fingers or toes polydactyly or an abnormally wide thumb or big toe hallux. The skin between the fingers and toes may be fused cutaneous syndactyly.
What is the difference between dominant vs. Can you tell me what I could do to show my class about this without this being long? Thank you.
I didn't know there was anything unusual about my hands until I was in sixth grade, sitting on the bus to an away game with the rest of the cheerleading squad. I rested my hand on the back of an eighth grader's seat, which is when she noticed my thumb. You have the same weird thumbs I do," she exclaimed.
Can you roll your tongue? McDonalda professor in the University of Delaware department of biological sciences, calls B. According to McDonald, teachers and textbooks have been over-simplifying this story for decades.
However, a study found that Of those subjects, In that study, People with the recessive gene for this condition are called carriers.
Stub thumb  is a condition clinically recognised by a thumb being relatively short and round with an accompanying wide nail bed as the distal phalanx of affected thumbs is approximately two-thirds of full-length thumbs. Stub thumbs are medically classified as brachydactyly type D BDD alias brachymegalodactylism. Hefner in'stub thumb' is a scientifically preferred term used to identify brachydactyly type D.
The Thumb Variation Lab explores not only measuring in the metric system but also serves as an introduction to statistical analysis of data taken by a simple measurement from the human hand, as well as thumb genetics. This is also called hyperextension of the thumb. People who carry either one allele or two alleles for a thumb that is straight, or close to being straight, express the dominant allele. You will be identifying your own thumb, and then everyone elses, as to which phenotype it is, in your class.