The following traits are considered qualitative traits EXCEPT: Hair color Flower color Presence vs. absence of horns Body size Curly hair vs. straight hair
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Which of the following is not considered Mendelian inheritance or a Mendelian trait? A. wet vs dry ear wax B. gum color in dogs C. presence or absence of freckles D. yellow vs green color in pea seeds
Sri K.
LO 77 Identify the elements that make a quantitative trait. Which of the following characteristics would be considered a quantitative traits? Select all that apply. Two Indian Paintbrush flowers raised in the same environment were crossed. One parent was yellow and the other was reddish orange. Of the cross, the F2 generation showed a diverse distribution of colors from yellow to reddish orange. This differs from the flower color of Mendel's peas where the F2 individuals were either purple or white, the two parental phenotypes. Two identical twins were born, but separated at birth, growing up in completely different environments. IQ tests were performed on the twins when they turned eight years old. The IQ test of one twin was much higher than the other, even though identical twins have the same DNA. Primary Hypertension (High Blood Pressure) has been studied to be influenced by genes at different loci. 45% of Adults in the U.S. have hypertension. It has been found that there is a gene involved in the mechanism of tasting bitter taste such as PTC, this is TAS2R3 found in chromosome 7. The ability to sense bitter taste is dominant over not being able to perceive said taste. About 80 percent of an individual's height is believed to be determined by the DNA variants that they inherit. Height is controlled largely by a combination of genetic variants that each have modest effects on height, plus a smaller contribution from environmental factors like nutrition. More than 700 gene variants have been discovered and many more are expected to be identified. Presence or absence of leprosy. Susceptibility to leprosy is determined by multiple genes and numerous environmental factors. Research has shown that the concentration and metabolism of serum lipids, which includes cholesterol, LDL, HDL and triglycerides, in the blood of pigs have been linked to numerous loci in the genome. The flower Gaillardia pilchella has been known to show variation in flower diameter. This trait is controlled by a number of genes. One of the first species described by Carl Linnaeus was Plumeria rubra, a type of plant found throughout Mexico, Central America, and the top of South America. Now, it's cultivated and sold around the world. The color of Plumeria rubra flowers has been found to be controlled by one gene at a loci and the location of the plant does not impact phenotypic ratios.
Adi S.
Which of the following is NOT an example of a quantitative trait? The brightness of the orange coloration of clownfish is affected by multiple genes and the amount of carotenoids in their diet. All of these are examples of quantitative traits. The risk of heart attack in humans is affected by diet and by multiple genes with small effects. Sickle cell anemia is caused by mutations in a single gene called beta globin. Growth rate of rainbow trout shows continuous variation and is affected by water temperature.
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