Multiple choice questions 1. A woman affected with a mitochondrial disorder will
ID: 208730 • Letter: M
Question
Multiple choice questions
1.
A woman affected with a mitochondrial disorder will likely transmit the disease to
all of her sons, but none of her daughters
all of her daughters, but none of her sons
all of her children
none of her children
2.
The endosymbiosis theory attempts to explain which of the following?
The process of DNA methylation.
The presence of mitochondrial and chloroplast genomes in eukaryotic cells.
The influence of the mother’s genotype on the offspring’s phenotype.
The development of Barr bodies in XX cells.
3.
What is the molecular mechanism for imprinting a gene?
Nitration
Methylation
Phosphorylation
Acetylation
4.
Epigenetic inheritance may occur at which of the following stages?
Spermatogenesis
Oogenesis
Embryogenesis
All of the other choices are correct.
5.
The marking process for genomic imprinting initially occurs during
embryonic development
adulthood
gametogenesis
fertilization
all of her sons, but none of her daughters
all of her daughters, but none of her sons
all of her children
none of her children
Explanation / Answer
1. all of her children
A woman affected with a mitochondrial disorder will likely transmit the disease to all of her children.
The mitochondrial DNA will be inherited by all children irrespective of their sex.
2. The presence of mitochondrial and chloroplast genomes in eukaryotic cells.
The endosymbiotic theory explains how a eukaryotic cell (having mitochondria and chloroplast) has evolved from a prokaryotic cell.
3. Methylation
Gene imprinting involves histone methylation and DNA methylation.
4. All of the other choices are correct.
Epigenetic inheritance may occur at spermatogenesis, oogenesis or at embryogenesis stages.
5. gametogenesis
The marking process for genomic imprinting initially occurs during gametogenesis.
In genomic printing, during gametogenesis, the chromosome is marked as to its parental origin.
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