1- list the steps in the process of the fertilization of an ovum.
2- describe the differences between recessive, dominant, and co-dominant genetic trails.
1) List the steps in the process of the fertilization of the ovum
I presume that we're talking about the stage at which the sperm has actually reached the vicinity of the ovum.
In order to answer this question, consider some of the defenses the ovum has against sperm.
The ovum has a thick layer of cells lining the outside which must be breached before reaching the zona pellucida (ZP), the great barrier of the ovum. How does a sperm breach the layer of cells, known as the corona radiata, and breatch the ZP? Equally important, how does the ovum prevent multiple sperm from breaching the ZP (as in, how does the ovum stop other sperm once one of them is past the ZP?) The breaching of the ovum's defenses involves 2 (e.g. it breaches the corona radiata and interacting with the ZP) to 4 steps here, depending on the level of detail required, which you may wish to research/recall. ...
Fertilization for genetic trails are examined. The differences between recessive, dominant and co-dominant genetic trails are determined.
Ethics and Biology in DNA screening
Please explain the biological ethics with the following:
According to insurance providers they believe their companies are unfairly having to insure people with high probability of inheriting debilitative diseases.
Can certain types of DNA screening protect individuals from these discriminatory actions?
Please cite your references so I can research this on my own.View Full Posting Details