A. DNA stores and transmits genetic information. Genes are sets of instructions encoded in the structure of DNA.
B. Genetic information is passed from generation to generation by DNA in all organisms and accounts for similarities in related individuals.
C. Manipulation of DNA in organisms has led to commercial production of biological molecules on a large scale and genetically modified organisms.
D. Reproduction is characteristic of living things and is essential for the survival of species.
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Original Student Tutorials Science - Grades 9-12
Learn how to describe Meiosis, the process by which sex cells--the sperm and the egg--are created in living things. In this interactive tutorial, you will also discover how sexual reproduction results in genetically diverse offspring.
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Original Student Tutorial
Learn how to describe Meiosis, the process by which sex cells--the sperm and the egg--are created in living things. In this interactive tutorial, you will also discover how sexual reproduction results in genetically diverse offspring.
Type: Original Student Tutorial
Tutorials
Spermatogenesis is the process in which spermatozoa are produced from male primordial germ cells by way of mitosis and meiosis. This tutorial will help the learners to understand the process of spermatogenesis.
Type: Tutorial
This tutorial discusses the process of meiosis which results in the formation of sperm cells and egg cells. It is the process by which diploid cells become haploid gametes.
Type: Tutorial
This animation describes what occurs in a cell during the process of meiosis. Each phase of meiosis is defined and a visual accompanies the definition. Students can see the process of a diploid cell becoming a haploid cell.
Type: Tutorial
This tutorial will help you to understand the three unique features of meiosis and how meiosis is related to genetic inheritance.
Type: Tutorial
This animation details the process of meiosis and explains each of the stages.
Type: Tutorial
This tutorial will help you to understand how meiosis II is very similar to mitosis. In both cases, chromosomes line up and sister chromatids are separated by the action of the spindle fibers.
Type: Tutorial
This tutorial will help you to understand the unique features of the first round of meiosis. In meiosis 1, members of homologous chromosome pairs are separated. This results in the segregation of genes into two gametes.
Type: Tutorial
An important fundamental concept of genetics is the idea of independent assortment. This states that genes are inherited independently of one another. This tutorial will help you better understand crossing over and independent assortment during meiosis.
Type: Tutorial
Meiosis is the process by which a diploid eukaryotic cell divides to generate four haploid cells. This process is important in forming gametes for sexual reproduction. This tutorial will help you understand the process of meiosis and its various stages.
Type: Tutorial
This tutorial will help you to understand the basic principles of genetic inheritance which are segregation and independent assortment of two alleles.
The principles of genetic inheritance are based on unique features of meiosis. Synapsis of homologous chromosomes and the separation of the homologous pairs during anaphase 1 cause the segregation of alleles. Crossing over and the random separation of chromosomes cause independent assortment.
Type: Tutorial
This tutorial will help students understand the process of meiosis. Each stage in the process of meiosis is explained and animated in this tutorial.
Type: Tutorial
Video/Audio/Animation
This site has fantastic short Flash animations of intricate cell processes, including photosynthesis and the electron transport chain.
Type: Video/Audio/Animation