Biology Final

Which of these is true about DNA, proteins, and the expression of genetic traits

Genes in DNA code for the production of proteins, which cause traits to be expressed

Which of the following is shown by this gel?

The size of various molecules or fragments of DNA

Extinction occurs when a species dies out completely. Which of the following is a major factor leading to extinction?

a lack of genetic diversity

A mistake during DNA replication leads to a mutation in the nucleotide sequence shown below. What kind of mutation will result from the mistake made during DNA replication in the nucleotide sequence above?

a nonsense mutation

A diagram demonstrating the process of protein translation is shown below. The structure labeled with a question mark in the diagram represents

a ribosome.

Which of the following best describes a sex-linked trait?

a trait determined by a gene located on an individual's X or Y chromosome

Gregor Mendel is often called the "father of modern genetics" for his study of inheritance in pea plants. How did Mendel identify the genetic variation within the pea plants?

by observing and comparing the physical features of the pea plants

A gene is a segment of DNA that codes for a particular protein. One DNA molecule typically contains thousands of genes. So, in order to fit into the nucleus of a cell, DNA molecules must be wound around proteins into structures known as _______.

chromosomes

segments of DNA can be cut using ________.

enzymes

DNA provides the blueprint for the synthesis of proteins. A _______ is a segment of DNA that codes for one particular protein.

gene