CHILD DEVELOPMENT PEDAGOGY

GROWTH DEVELOPMENT CHILD

GROWTH AND DEVELOPMENT

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Genetic mutations can be ____
A
beneficial, harmful, or neutral
B
beneficial only
C
harmful only
D
neutral only
Explanation: 

Detailed explanation-1: -Mutational effects can be beneficial, harmful, or neutral, depending on their context or location. Most non-neutral mutations are deleterious. In general, the more base pairs that are affected by a mutation, the larger the effect of the mutation, and the larger the mutation’s probability of being deleterious.

Detailed explanation-2: -Mutations can be neutral, harmful, or beneficial, though the neutral theory of molecular evolution predicts that most mutations are “nearly” neutral or only slightly deleterious, while beneficial mutations-which confer a survival advantage on an organism and, if it reproduces, on its progeny-are quite rare.

Detailed explanation-3: -Most mutations are not harmful, but some can be. A harmful mutation can result in a genetic disorder or even cancer. Another kind of mutation is a chromosomal mutation. Chromosomes, located in the cell nucleus, are tiny threadlike structures that carry genes.

Detailed explanation-4: -It is well-known that most mutations arise spontaneously and they are, in general, either harmful or neutral. However, only a rare few are advantageous to the organism, as they increase its viability and reproductive ability (Darwinian fitness).

Detailed explanation-5: -Many mutations are neutral and have no effect on the organism in which they occur. Some mutations are beneficial and improve fitness. An example is a mutation that confers antibiotic resistance in bacteria. Other mutations are harmful and decrease fitness, such as the mutations that cause genetic disorders or cancers .

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