Answer:
1. SnapDragon - incomplete dominance
2. Cows/chickens- multiple alleles
3. Blood type in humans - co-dominance
4. Skin and hair color - polygenic inheritance
Explanation:
1. Sometimes, the phenotypic expression of a recessive allele cannot be completely covered by that of the dominant allele. This is called incomplete dominance. Flowers of snapdragon and four'o clock plants are the example of such an event where the recessive allele for flower color, which is white is also expressed in heterozygous plants along with the dominant red color, producing pink flowers.
2. Multiple alleles determine the genetic traits of cows and chickens.
3. There are three alleles in humans that determine the blood type - dominant Ia and Ib for A and B type respectively, and recessive Io for O type. when in a heterozygous person, both dominant alleles are present, both are expressed phenotypically forming AB type blood. this is called Co-dominance.
4. Skin and hair color in humans is determined by multiple alleles present in different chromosomes. this is called polygenic inheritance.
<span>The main function of the muscular system is movement. Muscles are the only tissue in the body that has the ability to contract and therefore move the other parts of the body. Related to the function of movement is the muscular system's second function: the maintenance of posture and body position.</span>
Answer:
The correct answer is option d.
Explanation:
An insult in the medical terms refers to some kind of mental or physical injury, like a skin burn may the outcome of a chemical, thermal, electrical, or radioactive insult. Conceptus refers to an initial phase of the embryo at the time of pregnancy, which is primarily susceptible to the chemical insult because of the requirement for the spatial localization and precise temporal of the cells and cell products, restricted drug metabolism competency, and due to the rapid rate of cell proliferation.
Answer: B. The blood is circulated out of the body for cleansing and then returned.
Explanation:
Hemodialysis is a medical therapy in which the patient's blood is taken out with the help of tubes and treated out of the body. The blood is pumped out using the blood compartment. The blood is circulated using a external filter, that is called as dialyzer. The blood get cleansed and impurities are removed and purified blood returned via circuit back to the body. This technique is used to control the blood pressure and balance of important minerals in the body that involves the potassium, sodium and calcium in the blood.
Based on the above information, option. B is the correct option.
Answer:
Therefore, 98% of the US population have no alleles for PKU
Explanation:
The Hardy-Weinberg equilibrium states that the amount of genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.
The Hardy-Weinberg equilibrium is expressed quantitatively using a mathematical equation known as the Hardy-Weinberg equation. the equation is given below:
p² + 2pq + q² = 1
also, p + q = 1
Given a pair of alleles, S and s with A dominant and a recessive
where p is the frequency of the dominant allele in the population,
q is the frequency of the recessive allele in the population,
p² represents the frequency of the (SS) dominant genotype,
q² represents the frequency of the (ss) recessive genotype,
2pq represents the frequency of the heterozygous genotype
From the given question,
q² = 1/10000 = 0.0001
q = 0.01
from p + q = 1
p = 1 - 0.01 = 0.99
p² = 0.98
Therefore, 98% of the US population have no alleles for PKU
