Answer:
The chance of a woman with an AB blood type and a man with an O blood type having a child with O blood is 0%.
Explanation:
A mother with blood type AB (AB) will pass either antigen A or antigen B to the offspring, while the father with blood type O (OO) will not pass any antigen.
The result of an AB X OO cross would be
Alleles O O
A AO AO
B BO BO
For this reason, the offspring of this couple will be
- <em>Blood type A (AO) 50%.
</em>
- <em>Blood type B (BO) 50%.
</em>
- <em>Blood type O (OO) none.
</em>
Heredity of blood type depends on the presence of surface antigens on the erythrocyte membrane. Blood type O occurs in persons whose red blood cells do not possess surface antigens A or B.
Surface antigens are what determine blood type, so
:
- <em>The presence of antigen A determines blood type A.
</em>
- <em>Blood type B depends on the presence of antigen B.
</em>
- <em>Blood type AB has both antigens.
</em>
Blood type O has no antigens, and for blood type O to manifest, it must have both alleles for O.
A mother AB and father O cannot have offspring with blood type O.
Answer:
b. transcription
Explanation:
Transcription is the process by RNA is synthesized from DNA. It is carried out by RNA Polymerase enzyme which uses DNA as template. It builds new RNA strand in 5' to 3' direction from the template strand. A gene to be transcribed has a promoter region in front of it. RNA Polymerase is required to bind to this region to begin transcription. Once it binds to this region, the two DNA strands separate locally starting the process of transcription.
Rifampin inhibits RNA transcription by inhibiting bacterial DNA dependent RNA Polymerase. It binds to the beta sub unit of RNA Polymerase which does not allow it to properly bind to the promoter region thus halting transcription process.
1) Pulmonary Circulation:This is the process where
deoxygenated blood is carried away from
the right ventricle of the hearth while oxygenated blood is returned to the
left ventricle and atrium of the heart.
2) Heart: It is a muscular organ that pump blood through the blood
vessels of the circulatory system.
3) Systemic vain: <span>this is a vain that drain into the right right
atrium </span>
4) Physical exertion:It the expenditure of energy expended during physical
activity.
5) Vasoconstriction:It can be defined as the narrowing of the blood vessels which
result into contraction of the muscular wall of the vessels most especially
large arteries and small arterioles.
6) Vasodilation: This is when blood vessel is widening and result in
relaxation of smooth muscle cell within the vessel walls.
Protists
<span> Bacteria </span>
<span>land plants </span>
<span>amphibians </span>
<span>mammals </span>
It requires energy does active transport differ from all other forms of transportation