Viruses use energy from their hosts to reproduce. viruses do not have most of the parts needed to be considered living, but it does reproduce and evolve.
Tumor-suppresor genes inhibit cell division in the cell-cycle to repair DNA that is damaged or abnormal chromosomes to stop the mutation of such genes which causes pathology in the body.
Answer:
Statement like this 'If the wound edges are red or raised, you should call your doctor." need to be clarified by a nurse preceptor.
Explanation:
Suture is a thread-like material or a stitch which is used to hold together or sew tissue or surgical incision together.
A nurse preceptor is a nurse that is highly experienced and known to be competent, playing a role as a role- model or point of call either to a newly employed staff nurse or a nurse that has just been posted to a new unit or section, where he/she has no experience about.
In this case , the novice nurse must clarify the statements from the the nurse preceptor before disseminating it to the client. This is very important , in order to avoid a negative aftermath effects.
The homozygous recessive traits are those traits, which occur due to the inheritance of two recessive alleles of coding for a particular genotype.
The real life example of a homozygous recessive trait is sickle cell anemia. In this condition, the inheritance of the recessive alleles for sickle shape red blood cells leads to change in the shape of the red blood cells to sickle like. Due to the changes in the shape of red blood cells, it is not able to carry the oxygen in the blood, which leads to the anemia condition.
Answer:
You have to do a test cross. If all the offspring have normal wing, then the the stock are from pure-breeding flies, but if 3/4 of the offspring have normal wings and 1/4 have short wings, then the stock is from heterozygous for the wing-length trait.
Explanation:
A test cross was proposed by Mendel. It was developed to determine the zygosity of an individual. It consists in crossing the individual (which present the dominant phenotype) with an individual that exhibits the recessive phenotype. Then you have to analyze the proportions of phenotypes in the offspring.
If a pure-breeding individual is crossed with a homozygous recessive individual; then all the offspring will have the dominant phenotype.
If a heterozygous individual is crossed with a homozygous recessive individual; then 3/4 of the offspring will have the dominant phenotype, and 1/4 will have the recessive phenotype.
To have the dominant phenotype, the individual need to have at least one dominant allele, while to have a recessive phenotype, both alleles need to be recessive.
