GENETIC& CYTOPLAMICS INHERITANCE

1. K.SATHISH KUMAR
DEPARTMENT OF EDUCATION
ALAGAPPA UNIVERSITY
GENETIC SEMINAR
TOPIC;
CYTOPLAMICS INHERITANCE

2. DEFINITION
• Cytoplasmic inheritance is a gene of nuclear
gene and other extra-nuclear that is
transmitted from one generation to the next
generation through chromosome ,that play an
important role in biological inheritance.

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5. • The job of the sperm is to introduce the nucleus from
the father cell.
• So that the gene present inside the zygote is half of the
father and half of the mother.
• The sperm doesn’t provide any cytoplasmic contain,
but only the nuclear material.
• Still the zygote have the cytoplasm from the egg i,e
mother.
• So there is nothing inter-ferance of the father in
heritance,
• These specific inheritance mediated by the cytoplasmic
is called as the cytoplamic inheritance.

6. MIRABILIS 4.O’CLOCK PLANT.
• In 4.oclock plant there are three type of branch,
• They are of leaf variegation, the normal green leaves
and pale green.
• Flower with normal green leave produce seed that
grow into plants with normal green leave irrespective
of whether they are pollinated by pollen from branch
with normal green, variegated or pale green leaves.
• Flower on pale green branches produce seed that grow
into plant with only pale green leafs regardless of the
pollen parent.
• Flowers on variegated branches yield offspring of three
kinds, viz.., green, variegated and pale green.

7. Progeny of a variegated 4.o’clock
plant.

8. • It is clear that variegation is determine by agencies transmitted only
through the female and that is not influenced by the types of pollen
used.
• These agencies are the chloroplast s
• They are capable of self-duplication and are transmitted from
generation to generation through the cytoplasm of the egg.
• Seed borne on a green branch have therefore only green plastids,
• Seed borne on green a pale green branch have therefore only pale
green plastids ,
• Seed borne on a variegated branch have green or pale green or a
mixture of the two types of plastids.

9. • Variegation is thus a hereditary character
determined by stable, self-duplicating, extra-
nuclear particles called plastids.
• Neither the nucleus of the female gamete nor
the male gamete is involved in the control of
this type of hereditary character.

10. •THANKS.