Complete question:
Suppose "A" is a dominant gene for the ability to taste phenylthiocarbamide and "a" is a recessive gene for the inability to taste it. Which couples could possibly have both a child who tastes it and a child who does not?
a. father AA, mother aa
b. father Aa, mother AA
c. father Aa, mother Aa
d. father AA, mother AA
Answer:
c. father Aa, mother Aa
Explanation:
According to the given information, the ability to taste phenylthiocarbamide is a dominant trait and is imparted by the allele "A". This phenotype would be expressed in both homozygous and heterozygous conditions. The non-taster phenotype would be expressed in the homozygous recessive genotypes only.
To have both taster and non-taster children, both the parents should have at least one copy of the recessive allele. Among the given options, the father with genotype Aa and the mother with genotype Aa have the possibility to have both taster and non-taster children.
Aa x Aa= 3/4 taster (1/4 AA and 1/2 Aa): 1/4 non-taster (1/4 aa)
The answer for the above question is the Avascular Necrosis. It occurs as an interruption in the blood flow within the bone resulting in the death of the hematopoietic cells, osteocytes, and marrow fat cells making up the bony structure. It is also called osteonecrosis or ischemic bone necrosis, which occurs when there is loss of blood to the bone, since the bone is a living tissue that needs blood, this interruption of blood supply will result to the death of the bone.
According to the second law of thermodynamics, energy is never 100% efficient because some of the energy disperses as heat.
The answer to this question would be Ronchi.
Ronchi is low-pitch sound from lungs that might be caused when there are liquid inside the alveolus. That is why the sound might be disappeared after the patient coughing as it can remove the liquid. Ronchi is common is pneumonia/lung infection patient.
Others lung sound with high-pitch would be called wheezing, which common in asthma.
Answer: A group of scientists wants to determine whether a relationship exists between alcohol consumption and certain types of cancer. To this end, scientists provide study participants with a questionnaire asking them how many alcoholic drinks they have per week and what diseases they have (if any). These scientists provide subjects with a similar questionnaire annually (for a decade). These scientists are performing an ASSOCIATION STUDY.
Explanation: Association study is observational study in different individuals to see if a particular behavioral pattern (such as alcohol consumption) can be associated with certain type of disease (such as cancer).
Information collected from the questionnaires distributed will be subjected to statistical analysis and conclusion(s) will be made.
