Navigation Links
Heterozygote


Heterozygote cells are diploid or polyploid and have different alleles at a locus (position) on homologous chromosomes. When an organism is referred to as a heterozygote, or being heterozygous for a specific gene, it means that the organism carries two different versions of that gene on the two corresponding chromosomes. Heterozygosity refers to both the state of being a heterozygote, but more commonly in population genetics to the fraction of individuals in a population that are heterozygous for that locus.

The effect of heterozygosity depends on the protein product coded for by the gene in question. In some cases a mixture of normal and abnormal proteins is produced. In other cases, the abnormal allele may produce no protein at all. If the proteins are enzymes, the less-functional enzyme molecules usually have no effect and the person is an asymptomatic carrier. If the proteins are structural, such as those that comprise skin or bone matrix, a mixture of normal or abnormal products usually produces abnormal skin or bone, and the resulting abnormality is termed a dominant trait or disease. An abnormal gene that produces no protein may not affect the person at all if the other chromosome has a normal copy of the gene; this would be referred to as a recessive disease.

To describe how a trait inherits (Main article: Mendelian inheritance), the dominant trait is indicated with a capital and the recessive with a lower case character. The colour of Mendel's peas are often indicated as PP for the dominant homozygote pink flower and pp for the recessive homozygote white flower. When these are crossed, the F1 or second generation will be heterozygote for the colour of the flower and this will be indicated with Pp. All F1 plants will flower pink.

Some traits are neither dominant nor recessive but are intermediary: the red carnation crossed with a white carnation will give you heterozygote pink carnations.

See also


'"/>


(Date:12/19/2014)...   LaunchKey , the first decentralized mobile authentication ... of Things era, today announced the close of $3 ... led by Metamorphic Ventures with participation from ENIAC Ventures, ... others.  LaunchKey has raised $4 million to date, and ... and bring LaunchKey to market in 2015. ...
(Date:12/17/2014)... , Dec. 16, 2014 Research and ... the addition of the "Global Chemical Sensor ... http://photos.prnewswire.com/prnh/20130307/600769 ... the increasing demand for medical sensors in biomedical ... data for quick and correct diagnosis during surgical ...
(Date:12/11/2014)...  That blood pressure plays a role in human health ... medical term for high blood pressure – was first described ... cuff that,s used in measuring blood pressure was invented in ... about hypertension, its triggers and its effects. In fact, recent ... the best ways to treat it. For example, ...
Breaking Biology News(10 mins):LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3Global Chemical Sensor Market 2015-2019: Key Vendors are Abbott Laboratories, Bayer, Hoffmann La-Roche, Johnson & Johnson, NGK Spark Plugs and Robert Bosch 2Research points to need for new approaches to treatment of high blood pressure 2Research points to need for new approaches to treatment of high blood pressure 3Research points to need for new approaches to treatment of high blood pressure 4
... Resveratrol, a compound in grapes, displays antioxidant and ... researchers at the UT Health Science Center San Antonio ... beneficial health effects. Resveratrol stimulates the expression of ... store fat, the team found. Adiponectin has a wide ...
... The bacterium which causes acne (Propionibacterium acnes) will be the ... Peter Lambert of Aston University. As well as acne, this ... is often ignored at diagnosis. Why are we not more ... length of stomach upsets and boost the immune system: , ...
... study that relates global energy use to economic growth, ... finds strong correlations between these two measures both among ... the study,s authors to infer that energy use limits ... in energy supply will be required to meet the ...
Cached Biology News:Grape ingredient resveratrol increases beneficial fat hormone 2Probiotics, prebiotics and biofuel-producing bacteria 2Study finds energy limits global economic growth 2
Other biology definitionOther Tags