One of two major forms of a human condition called neurofibromatosis (NF 1 ) is inherited as a dominant gene, although it may range from mildly to very severely expressed

Which of the following is the best explanation for why a young, affected child is the first in her family to be diagnosed? A) The mother carries the gene but does not express it.
B) One of the parents has a mild expression of the gene.
C) The condition skipped a generation in the family.
D) The child has one more chromosome than either of the parents.


B

Biology & Microbiology

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Latex bead agglutination tests are

A) rapid and reliable tests used for the detection of certain bacteria as well as certain serum antibodies. B) inferior tests used in developing countries not having facilities for more reliable assays. C) an integral part of the EIA test procedure. D) too expensive for routine use.

Biology & Microbiology

An internal checkpoint can be found where?

a. after anaphase b. after telophase c. during metaphase d. after the S phase

Biology & Microbiology

Each individual bacterial colony contains ____ recombinant plasmid as/than the other colonies on the plate, and the

DNA sequence of the recombinant plasmid present in any given colony can be identified using a ____. a. a different; DNA chip b. the same; DNA chip c. the same; DNA probe d. a different; Western blot e. a different; DNA probe

Biology & Microbiology

The allele that causes Huntington's disease is expressed earlier in life when it is inherited from the father than when it is inherited from the mother. Huntington's disease is an example of 

A. an X-linked trait. B. pleiotropy. C. gene imprinting. D. linkage.

Biology & Microbiology