Dictionary » C » Cytoplasmic inheritance

Cytoplasmic inheritance



A form of non-Mendelian inheritance in which a trait was transmitted from the parent to offspring through nonchromosomal, cytoplasmic means.


Some of the inherited traits in offspring are not nuclear in nature but involving other organellar genetic material.

One example of this is the mitochondrion that contains its own DNA. In humans, fertilization brings the male and female gametes together in union to form the zygote. A functional, mature human male gamete is compact since it loses most of its cytoplasmic contents for mobility. The ovum on the other hand is relatively bigger that it contains many cytoplasmic structures. Hence, most of the organellar genetic material would be derived from the female gamete that when the extranuclear DNA is expressed it is largely a maternal effect.

Other organelle that contains its own genetic material is the chloroplast in plants.


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How would you confirm extra chromosomal inheritance ?

Extra chromosomal inheritance refers to cytoplasmic inheritance. in certain organisms, some characters are controlled by genes present in the cytoplasm.Here, ...

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by Harleen
Fri Jun 18, 2010 4:13 am
Forum: Genetics
Topic: How would you confirm extra chromosomal inheritance ?
Replies: 3
Views: 4588

human embryo development

... are not only dependent of genetic constituations but also on Cytoplasmic inheritance . Try this: Insert human fertilised egg nuclii in monkey egg(on removing its nuclii). ...

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by sachin
Fri Nov 10, 2006 4:26 pm
Forum: Cell Biology
Topic: human embryo development
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mtDNA vs normal DNA - how to illustrate it in plants

... genome is approximately 16kb pairs. The real meat of mitochondrial inheritance is that cytoplasmic genes do not demonstrate Mendelian patterns of inheritance. Furthermore, it is ...

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by ERS
Sun Jul 10, 2005 10:14 pm
Forum: Genetics
Topic: mtDNA vs normal DNA - how to illustrate it in plants
Replies: 3
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