Genetics and Evolution Fundamentals

The study of genes, genetic variation, and heredity in living organisms.

Genetic variation refers to the differences in genetic information among individuals within a species. It is important because it contributes to genetic diversity, which provides a survival advantage by increasing the chances of individuals having traits advantageous for adapting to changing environments and provides the raw material for evolution.

Natural selection

<p>Genetics provides the variation that evolution acts upon.</p> Signup and view all the answers

<p>A person's height can be influenced by nutrition during growth periods. Despite having genes for tallness, a person might not reach their potential height if they don't receive adequate nutrition during their growing years.</p> Signup and view all the answers

<p>Eye color, hair color, skin color, height, disposition towards certain health conditions, and some aspects of personality and intelligence.</p> Signup and view all the answers

<p>The main structures within an animal cell include the nucleus, cytoplasm, and cell membrane. The nucleus acts as the control center of the cell, the cytoplasm contains all organelles and cell parts, and the cell membrane controls the movement of substances in and out of cells.</p> Signup and view all the answers

<p>DNA is a molecule with a double helix structure made up of nucleotide bases (A, T, G, and C) paired together and a sugar-phosphate backbone. It stores and transmits genetic information, and its structure allows for accurate replication and protein synthesis.</p> Signup and view all the answers

<p>Beneficial genes spread throughout the population and detrimental genes become rarer.</p> Signup and view all the answers

<p>Chromosomes are structures found in the nucleus of cells, consisting of proteins and DNA. They carry genes, which are segments of DNA containing instructions for making proteins, and their structure allows for efficient packaging of DNA and ensures accurate distribution during cell division.</p> Signup and view all the answers

<p>It leads to the diversity of life on Earth.</p> Signup and view all the answers

<p>Genetic factors determine the potential for a trait, while environmental factors can affect the expression of that trait. For example, a person's genetic makeup may influence their skin color, but sun exposure can cause the skin to produce more melanin, leading to a darker skin tone.</p> Signup and view all the answers