+
Basic Concepts of Heredity
Next Generation: HS.LS3.2 HS.LS3.2

Basic Concepts of Heredity

Author: Nathan Lampson
Description:

This lesson will introduce several basic genetic terms as well as examine some basic concepts of heredity.

(more)
See More
Try a College Course Free

Sophia’s self-paced online courses are a great way to save time and money as you earn credits eligible for transfer to over 2,000 colleges and universities.*

Begin Free Trial
No credit card required

25 Sophia partners guarantee credit transfer.

221 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 20 of Sophia’s online courses. More than 2,000 colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.

Tutorial
TERMS TO KNOW
  • Gene

    A genetic unit of heredity; a specific section of DNA that codes for a specific protein.

  • Allele

    Variation in a gene, an example would be eye color; there is a gene for eye color but there are different versions of genes that allow for different eye colors.

  • Locus

    The term used to describe the specific location of a gene/DNA sequence on a chromosome; variations of these genes are referred to as alleles.

  • Homozygous

    An organism with two identical alleles of a gene.

  • Heterozygous

    An organism with two different alleles of a gene.

  • Genotype

    A trait or characteristic expressed at the genetic level, that is, the genetic makeup of an organism.

  • Phenotype

    An observable characteristic of someone’s traits, examples: eye color, skin color, height, gender etc.

  • Dominant Alleles

    When one allele masks the expression of another on the same locus, this is seen at the phenotype level.

  • Recessive Allele

    An allele that is masked by a dominant allele, recessive alleles are only expressed when they are found in homozygous pairs.

  • Heredity

    The passing of traits from parents to offspring.

  • Gregor Mendel

    Dubbed the "father of modern genetics" and arguably modern biology, Mendel was an Austrian monk who studied heredity and inheritance in plants.

  • Inheritance

    Receiving genetic characteristics from parents, the manner in which genes are passed down to offspring.