Answer:
Vertical and horizontal
Explanation:
A punnet square is a tabular chart used in genetics to display the genotypic composition of the offsprings of two parents. To construct a punnet square, the alleles of the gametes produced by the parents is required.
The gametes produced by each parent via meiosis are placed along the vertical and horizontal sides of the punnet square. For example, if a cross occurs between two parents with the following genotype: AaBb and AAbb. The parents will produce the following gametes:
AaBb - AB, Ab, aB, ab
AAbb - Ab, Ab, Ab, Ab
These gametes produces by each parent will be placed along the sides (vertical and horizontal) of a punnet square to determine the genotype of the offsprings that will be produced.
The answer would be the eukaryote.
Not all veins and arteries travel together but most of them do. Reason being that veins don't have good means of pumping up to the heart and this is facilitated by arterial pulsations.
Muscular contractions help venous to pump blood because when muscle contract venous sinuses are caused to contract and blood be pumped up. Where there is no gravity muscular contraction is important because of the veins of the lower extremity.
When two different forms of a virus infect the same cell, the host cell may manufacture viral particles by a process called antigenic shift.
<h3>What is an antigen?</h3>
An antigen is any molecule or molecular structure that may trigger a suitable immune response in the host.
An antigen can be the target for antibody binding during classical adaptive immune responses.
In conclusion, when two different forms of a virus infect the same cell, the host cell may manufacture viral particles by a process called antigenic shift.
Learn more about antigen response here:
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