Answer:
sickle-cell anemia is not expressed
Explanation:
The heterozygote conditions shows that, the manifestation of theses condition is only possible if the carrier man(HbSHbA) get married to another heterozygote woman,( another carrier) so that the two recessive alleles are expressed as SS.
But as AS, this is not possible because of the non defective A-allele which is always dominant over the S
It's genetic variation or just variation
I don’t know the answer to this question
Answer:
If there was no system of lymphatic vessels, there would be no drainage of excess fluid from the tissues and the lymphatic fluid would accumulate in the tissues, causing them to swell.
Explanation:
The lymphatic vessel is made up of tiny vessels that are closed at one end and can be found in the spaces in the cells, except the central nervous system and the non-vascular tissues.
The main function of the lymphatic vessel is to move lymph which is a fluid that contains infection-fighting white blood cells to every part of the body.
So, if there was no system of lymphatic vessels, and tissue fluid was moved directly back into the circulatory system throughout the body. the lymphatic fluid would accumulate in the tissues, causing them to swell.
