<span>My pea plant has an unknown genotype for flowers, whether it has two dominant traits for white flowers (WW) or one dominant and one recessive (Ww) leading to white flowers; therefore I am doing a testcross in order to determine the genotype of my pea plant. The best plant to do this with is one that has a phenotype of purple flowers (ww) - that is, it is homozygous for the recessive trait.
If I use a homozygous recessive plant, I know exactly what its genotype is. I don't have to worry about whether it's got one or two dominant alleles; I know that at least half of my alleles are going to be the recessive w.
This makes identifying the offspring's genotype very simple. If I find that the offspring have at least some purple flowers among them, I know that my original plant had to be Ww; that is it had to have one dominant and one recessive allele for the flower color gene. If, however, all of the offspring are white flowers, I know that my original pea plant had both dominant alleles (WW).</span>
Answer:
Humans have nearly 30,000 genes that determine traits from eye color to risk for hereditary diseases. Those genes sit along six feet of DNA, which are organized into chromosomes and stuffed into each and every human cell. Chromosomes are coiled into loops and then organized into many large domains called topologically associating domains (TADs).
Explanation:
Answer:
Adaptation 99.99% sure
Explanation:
I did this many times in school
I would use a Transmission Electron Microscope.
Cellular immunity kills pathogens inside the cell, whereas humoral immunity destroys pathogens outside the cell.
<h3>What is the difference between Cellular and Humoral immunity?</h3>
The main difference between humoral and cell-mediated immunity is that humoral immunity produces antigen-specific antibodies, whereas cell-mediated immunity does not produce antigen-specific antibodies. The cellular immunity destroys pathogens and harm microbes that are present inside the cell, whereas humoral immunity kills pathogens outside the cell.
So we can conclude that cellular immunity kills pathogens inside the cell, whereas humoral immunity destroys pathogens outside the cell.
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