Select the incorrect statement from the following:a)Traits which are n...
Frequency of certain genes in a population change over several generations resulting in evolution. The factors affecting change in genetic frequency are natural selection, genetic drift, mutations and gene flow. Weight loss or gain occurs due to external factors such as food and is not genetically controlled. Hence, low weight parents can have heavy weight progeny due to difference in food habit. Frequency of inherited traits change over generation and causes evolution whereas traits that are not inherited over generations like dancing, playing guitar do not cause evolution.
Select the incorrect statement from the following:a)Traits which are n...
Incorrect statement: Reduction in the weight of an organism due to starvation is genetically controlled.
Explanation:
- Inherited traits: Traits which are passed down from parents to their offspring over generations are known as inherited traits. These traits are determined by genetic information present in the DNA of an organism. Inherited traits play a crucial role in evolution as they are responsible for the variation among individuals within a population.
- Low weight parents can have heavy weight progeny: The weight of an organism is influenced by a combination of genetic factors and environmental factors. While the genetic makeup of parents does play a role in determining the weight of their offspring, it is not the sole determining factor. Environmental factors such as nutrition, exercise, and overall health also play a significant role in the weight of an individual. Therefore, it is possible for parents with low weight to have progeny with heavy weight if the environmental conditions are favorable.
- Frequency of certain genes in population changes over several generations resulting in evolution: Evolution is a gradual process that occurs due to changes in the frequency of certain genes within a population over multiple generations. These changes can be influenced by various factors such as natural selection, genetic drift, mutation, and migration. As the frequency of certain genes changes, the characteristics of the population also change, leading to evolution.
- Reduction in weight due to starvation is not genetically controlled: When an organism undergoes starvation or extreme weight loss, the reduction in weight is primarily a result of the depletion of energy reserves and loss of body mass. This process is not genetically controlled but rather a physiological response to the absence or insufficient intake of food. The body uses stored energy and breaks down tissues to meet its energy requirements during starvation. However, the genetic makeup of an organism does play a role in determining how efficiently it utilizes and stores energy, which can influence the rate and extent of weight loss during starvation.
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