Answer:
One advantage of models is that all the mice are exactly alike except for color, enabling the control of all variables except the one being studied. Models are also easier to work with than live mice. One disadvantage of using models is that they do not have the same smell and behaviors as real mice.
Another advantage is that models can be reused for the experiment for a longer period of time with less maintenance.
<span>A. Natural selection
Able to find more food means more likely to survive - survival of the fittest i.e. natural selection.</span>
Genes that code for proteins that promote the phone cycle and inhibit apoptosis are known as proto-oncogenes.
In distinction to the cell proliferation-stimulating function of proto-oncogenes and oncogenes that power the cell cycle forward, tumor suppressor genes code for proteins that generally function to preclude mobile growth and division or even promote programmed mobile death (apoptosis).
<h3>Which of the following is a gene that generally codes for a protein that suppresses mobilephone division?</h3>
Tumor suppressor gene.
Lear more about proto-oncogene here:
<h3>
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The SYMPATHETIC nervous system prepares the body to expend energy whereas the PARASYMPATHETIC nervous system allows the body to restore and conserve energy
Answer:
B) Any child born of parents who are able to taste PTC will inherit the ability to taste PTC.
Explanation:
The ability to taste the chemical PTC (phenylthiocarbamide) contain some people who can and some people who cannot taste PTC. Despite the fact, this trait is often considered a simple Mendelian trait, i.e.one gene-two alleles.(a simple genetic trait governed by a pair of alleles).The reason why this trait has been kept going in the population is undetermined but polymorphism may influence food selection or nutritional status.
If we have two parents that are heterozygous for this PTC traits, if the cross, they will have the following types of offspring.
Let say; dominant T for tasting and recessive t for nontasting---- i.e Tt
If Tt crosses with Tt, we have;
T t
T TT Tt
t Tt tt
From the punnet square, we have the following offspring
TT (dominant PTC taster )
2 Tt ( heterozygous PTC taster)
tt (recessive Non- taster)
From, the foregoing, we can clearly see that the incorrect statement about the inheritance of the ability to taste the chemical PTC (phenylthiocarbamide) is Any child born of parents who are able to taste PTC will inherit the ability to taste PTC. This is because from the cross, it is not all children that inherit the ability to taste PTC.
