Answer: A trait that masks another trait is called dominant trait.
A trait is a characteristic or a morphological form that is expressed in an organism. There can be two different types of traits according to Mendelian genetics that is Dominant and Recessive trait. They are expressed due to two different forms of a gene that is called allele.
A dominant allele usually represented by capital letter like T for tall, corresponds to dominant trait and this masks the expression of recessive trait. Example- Tall plant height.
On the other hand, recessive allele is represented by small letter like t for dwarf and corresponds to recessive trait. This trait does not express in the presence of dominant allele.
Example- Dwarf plant height.
There aren´t any ABCD options so how about a brief explanation.
A dependent variable is a person, place, or thing that relies on another person, place, or thing for change. In a flower patch, the bee is the independent variable. It can carry whatever pollen without fail. The flowers are at the mercy of the bee whether they receive pollen or not, cypress pollen or sunflower pollen. Therefore, the flower(s) are the <u>dependent variable</u>(s).
Alfred Hershey and Martha Chase used radioactive isotopes to prove that DNA was the carrier of inherited material. They laid the foundation for Watson and Crick to prove that the double helix structure suggested the copying mechanism that allowed for DNA to function as a hereditary material!
Answer:
Option (e).
Explanation:
The two main types of immune cells are B-cells and T-cells. B cells are antibody producing cells where as T cells are antigen presenting cells.
A scientist claimed that a new blood borne virus can be indestructible by CD8+ cytotoxic T cells and kills many cells. But the medical community quickly denounces the warning as irrelevant because only CD8+ cells are not the only cells that are capable of removing viral infection. Natural killer cells are also involved in virus killing. The blood borne virus can not kill million cells as they are involved in the difficult mode of transmission.
Thus, the correct answer is option (E).