Human Genome

The correct Option is : 1

Step 1: Definition of gene pool.
The gene pool is the total set of genetic material, including all alleles for all loci, within a population or species. It represents the diversity of genes available for inheritance.

Step 2: Explanation of other terms.
Genetic drift: Refers to random changes in allele frequencies in a population.

Gene frequency: Refers to the proportion of a specific allele in the gene pool.

Gene mutation: Refers to a permanent change in the DNA sequence of a gene.

Step 1: Definition of genomics.
Genomics is the branch of biology that focuses on the study of the genome, which encompasses the complete set of genes within an organism. It involves analyzing their structure, function, and interactions to understand genetic information at a broader level.

Step 2: Explanation of other options.
Option (B): Incorrect. The study of heredity and variation in organisms is the field of genetics, not genomics.

Option (C): Incorrect. While genomics involves studying the genome, the definition specifically highlights the study of genes within an organism. Option (D): Incorrect. This describes epigenetics, which focuses on gene-environment interactions, not genomics.

Step 3: Conclusion.
The correct definition of genomics is the study of genes within an organism.

The human brain is divided into several parts, each responsible for different functions. Among these, the cerebellum plays a critical role in coordinating and regulating motor movements, which includes maintaining balance and coordinating muscle activity.

Cerebrum: The cerebrum is the largest part of the brain and is responsible for higher brain functions such as thinking, memory, decision-making, and sensory processing. It is not directly involved in balance and coordination.

Cerebellum: The cerebellum is located at the back of the brain, below the cerebrum, and is specifically responsible for maintaining balance and coordinating voluntary movements. It ensures smooth, coordinated movement by integrating sensory information from the eyes, ears, and muscles.

Medulla Oblongata: The medulla oblongata is located at the base of the brainstem and is responsible for autonomic functions like breathing, heart rate, and blood pressure. While it is vital for survival, it does not directly regulate balance and coordination.

Thalamus: The thalamus is responsible for relaying sensory and motor signals to the appropriate areas of the brain but does not play a direct role in balance or coordination. Therefore, the correct answer is Cerebellum, as it directly regulates the body's balance and coordination.