The differentiation of the sex of an embryo
A. occurs about month 4 of fetal development.
B. is determined by the presence or absence of the Y-chromosome and its genes.
C. occurs at conception.
D. is highly variable from one embryo to another.
B. is determined by the presence or absence of the Y-chromosome and its genes.
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The zona pellucida is
A) a protective layer around the secondary oocyte. B) a protective layer around the sperm. C) a bump on the head of a sperm that contains enzymes. D) the biggest constriction of a chromosome.
The group of animals with an efficient respiratory system, in that there is no "stale air" after exhalation, is the:
a. amphibians b. birds c. mammals d. reptiles e. fish
An organism's genotype is its genetic makeup. An organism's physical traits are its phenotype
a. true b. false
One advantage to using NGS genome assembly over the Sanger method is that ________.
A. NGS involves inserting the genomic fragments into vectors, which is an efficient process compared to using the oligonucleotide adapters employed in the Sanger method B. NGS involves the construction of a genomic library, giving extra depth of coverage compared to the Sanger method C. NGS sequences the same fragment no more than 10 times, avoiding wasteful processes compared to the Sanger method D. NGS avoids the need to insert fragments into cloning vectors, using oligonucleotide adapters that bind to a solid surface instead