During overshoot  

the direction of the electrical gradient for Na+ is reversed because the membrane potential is reversed & this limits Na + influx 

TLS Online TPP Program

#Id: 2052

#Unit 8. Inheritance Biology

Cytoplasmic Inheritance

a. Present in males and females.

b. Usually inherited from one parent, typically the maternal parent.

c. Reciprocal crosses give different results.

d. Exhibit extensive phenotypic variation, even within a single family.

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#Id: 2053

#Unit 8. Inheritance Biology

Homoplasmy- All mutated mitochondria

Heteroplasmy- wild type + mutant mitochondria

TLS Online TPP Program

#Id: 2054

#Unit 8. Inheritance Biology

Leber hereditary optic neuropathy (LHON)- People who have this disorder experience rapid loss of vision in both eyes, which results from the death of cells in the optic nerve.

TLS Online TPP Program

#Id: 2073

#Unit 8. Inheritance Biology

Number of Barr bodies zero in human cells with different complements of sex chromosomes such as XO (loss of one sex chromosome) causes Turner Syndrome.

TLS Online TPP Program

#Id: 2074

#Unit 8. Inheritance Biology

Persons with Klinefelter syndrome have a Y chromosome and two or more X chromosomes in their cells such as XXY, XXYY, XXXY and XXXXY.

TLS Online TPP Program

#Id: 2075

#Unit 8. Inheritance Biology

More than two X-chromosome causes Poly-X female and Triplo-X