OML Search

Cell Division and Reproduction

Related Topics:
More Lessons for Biology
Math Worksheets

A series of free High School Biology Videos and Lessons.

Gene Expression
Gene expression is the process of taking genetic information in DNA and translating it into biological functions such as protein synthesis. Gene expression explains the effect of genes on the body on both the macroscopic and microscopic level.

Understanding gene expression in reproduction.
Sex Chromosomes
Sex chromosomes are chromosomes that contain information that is used to determine the gender of an organism. The expression of a sex chromosome on an allele can either be X or Y. Organisms with sex chromosomes XY are male while organisms with sex chromosomes XX are female. Because men only have one X chromosome, recessive traits on a man's X chromosome are always expressed.

The description of sex chromosomes.

Sex Linked Genes
Sex linked genes are carried on the X and Y chromosomes, also known as the sex chromosomes. If a gene is carried on the Y chromosome, only men can inherit it. Recessive genes carried on the X chromosome are always expressed for men, who only have one X chromosome, but must be homozygous to be expressed in women.

Understanding sex-linked genes in reproduction.

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
Mathway Calculator Widget

OML Search

We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.