Answer:
The stem cells was discovered by Ernest McCulloch and James Till in 1981. Studies conducted for stem cells can be used for bone marrow transplantation and to treat various diseases.
Explanation:
Stem cell are the cells that has the ability to differentiate into different cells of the body. In 1978 human cord blood discovered as stem cell. The stem cell research come to known in 1981.
Ernest McCulloch and James Till discovered the stem cell research while working on the mice bone marrow. He found that the different blood cells were formed by the single class of cells.
Experiments on mice and other animals have been conducted to study the stem cells so far. The study of stem cell is useful to cure the genetic defects, Cancer and other harmful diseases.
Explanation:
The term Heterozygous and the recessive alleles are used in the Genetics to refer to the allele conditions present in an organism.
The trait of an organism is controlled by the genes which are present in its alternative form on the chromatids at a position called locus.
Recessive alleles
A trait is expressed when each parent contributes one allele and when these two alleles come in complementary position express its effect. The alleles which express its highest effect on a trait is called dominant allele and the other allele which is not able to show its effect or is suppressed is called the recessive allele.
Heterozygous parents
In such condition, when an organism has one dominant and one recessive allele is known as a heterozygous organism and if the allele pair has either both dominant or both recessive alleles are homozygous organisms.
Answer:
- 24 carbon atoms, 48 hydrogen atoms, and 24 oxygen atoms
Explanation:
Glucose is a simple carbohydrate and a compound that is made of the elements carbon, hydrogen, and oxygen.
One molecule of glucose contains six carbon atoms, 12 hydrogen atoms, and six oxygen atoms.
Therefore, four molecules of glucose will have 24 carbon atoms, 48 hydrogen atoms, and 24 oxygen atoms.
That is; 4(C₆H₁₂O₆), thus, C = 4×6 =24, H = 4×12 =48, and O = 4×6 =24.
<span>A nuclear envelope forms around each set of chromosomes and cytokinesis occurs. Obviously equaling in two daughter cells.</span>
A natural or artificial body that revolves around a celestial body of greater mas is called a Satellite<span />