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Biology 11th Edition by Gerald Audesirk,Teresa Audesirk,Bruce Byers
النسخة 11الرقم المعياري الدولي: 978-0134168296Biology 11th Edition by Gerald Audesirk,Teresa Audesirk,Bruce Byers
النسخة 11الرقم المعياري الدولي: 978-0134168296 تمرين 1
Which of the following does not apply to mutations?
A) They occur to cause adaptive changes in response to the environment.
B) They are usually either harmful or neutral.
C) They are only inherited if they occur in a sperm or egg cell.
D) They often occur when DNA is copied.
A) They occur to cause adaptive changes in response to the environment.
B) They are usually either harmful or neutral.
C) They are only inherited if they occur in a sperm or egg cell.
D) They often occur when DNA is copied.
التوضيح
موثّق
موثّق
Mutation in general is a modification of natural form of an organism, which leads to specific changes, resulting in the evolution of a new organism.
They are inherited during the transmission of genes from an organism to its offspring and this alteration in gene may or may not show any effect on next generation organisms and it is sometimes harmful too.
The variations in an organism due to mutation are passed to its offspring organisms when it occurs only in reproductive cells like egg or sperm cell. Sometimes, the mutations occur as a result of DNA damage or a change in the DNA sequence while copying DNA during replication process.
Thus, options (b), (c), and (d) are applicable to mutations and are incorrect answers.
The mutations usually occur in the gene of an organism and results in the alteration of gene expression in the transformed organism. These occur in response to changes in the environment and cause respective changes which are either neutral or harmful and are sometimes for defensive mechanisms.
Hence, the correct answer is option (a).
They are inherited during the transmission of genes from an organism to its offspring and this alteration in gene may or may not show any effect on next generation organisms and it is sometimes harmful too.
The variations in an organism due to mutation are passed to its offspring organisms when it occurs only in reproductive cells like egg or sperm cell. Sometimes, the mutations occur as a result of DNA damage or a change in the DNA sequence while copying DNA during replication process.
Thus, options (b), (c), and (d) are applicable to mutations and are incorrect answers.
The mutations usually occur in the gene of an organism and results in the alteration of gene expression in the transformed organism. These occur in response to changes in the environment and cause respective changes which are either neutral or harmful and are sometimes for defensive mechanisms.
Hence, the correct answer is option (a).
Biology 11th Edition by Gerald Audesirk,Teresa Audesirk,Bruce Byers
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