Biology Questions and Answers
- Why is sex-linked
inheritance an example of
nonmendelian inheritance?
Sex-linkenonmendelian d inheritance is a inheritance btype ofecause (^) it
opposes Mepostulates that each trait isndel’s first law, w alwayshich (^)
conditioned by two factors (alleles). In
nonhomolochromosomes thgous regions of the sexe genotypes of the (^)
genes contain only one allele (even in
the case owomen, one of the X chromf the XX karyotype, osomes isi.e., in (^)
inactive).
- What is mitochondrial
inheritance?
Mitochondrial inheritance is thof mitochondrial DNA moleculese passag e
(mtDNA) to the offspring. All stock of
mtDNA an from the mothindividual has her, the materave comnal e
grandmother, the maternal great
grandmothemitochondria arr and so on, sincee inherited from th (^) e
cytoplasm of the egg cell (that later
constituteszygote). the cytoplasm of the
There are several gecaused by mitochondrial innetic dheritance,iseases (^)
like Leber's hereditary optic neuropathy,
that leads to loss ofboth eyes, and the Kearns-Sayre the central vision o f
syndrome, a neuromuscular disease
that causes ofatigue. phthalmoplegia and muscle
Mitochondrial inheritance is an means of genetic analysis of theexcelle nt
maternal lineage (just like the Y
chromosome is an excellent means of
study of the paternal lineage).
http://www.biology-questions-and-answers.com