DNA is typically found in cells in the form of a very long strand that is coiled many times and contains thousands or millions of nitrogen bases. Which term best describes this very long molecule of DNA?

Humans use ________ to pass on desired phenotypic traits to the next generation of organisms.

Scientists typically transgenically alter ________ to produce more desirable species.

Since the early 1990s, geneticists have produced ____________ crops that yield fruits and vegetables commonly found in U.S. supermarkets.

____________ livestock are produced with extra copies of growth hormone genes to allow them to grow faster and produce meat that is low in fat.

A farmer cut a branch from his favorite, mature fruit tree, planted it in the soil, and it grew to be a new tree. The farmer's method of growing a new plant is a type of _____.

What is true about any two normal gametes from a human female parent?

As scientists have developed more productive crop varieties, farmers have switched from growing many traditional varieties to new high-yield varieties. In Peru, the Indians once grew 500 varieties of potatoes but now only 20.

A gene for disease resistance in fir trees is transferred to pine trees using modern DNA technology. How might this be economically helpful to tree farmers?

Genetically modified grass varieties that carry genes for disease and drought resistance are now available. They were produced by recombinant DNA technology. However, the government has still not approved the sale of most of them, because ___

All of the following EXCEPT the resistance of _________ demonstrate artificially selected resistance.

A segment of DNA that codes for the ability to make one type of protein molecule is known as a(n)____________________.

The table in your study guide shows the relative size of the genomes, number of genes, and number of chromosomes for a variety of different organisms. What is the relationship between the complexity of an organism and the number of chromosome

Place the components in order, from smallest to largest. Chromosome DNA nucleotide Codon Gene

Many farmers now grow insect-resistant varieties of cotton. The gene for the favorable trait, in this case, insect resistance, is transferred to the cotton's DNA using

The development and use of transgenic farm animals has not progressed as fast as the development of transgenic plant species. This may be due to all of reasons given EXCEPT

In the near future gene therapy may provide cures for genetic disorders such as severe combined immunodeficiency or cystic fibrosis. In this case, scientists are using __________ to deliver good genes, or genes to halt a disorder, to the cells of a p

How many pairs of chromosomes does a genetically-normal human being have?

Suppose farmers want to create a new form of potato that is more nutritious than the kind sold in stores today. These farmers would MOST LIKELY choose

In nature, organisms mate without human interference. This is called

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