Which of the following is NOT a characteristic of an autosomal recessive trait?
A. All of the children of two affected
individuals are affected.
D. Every affected individual has at least one
affected parent.
B. If two individuals are heterozygous, the
risk of having an affected child is 1:4.
E. All of these are characteristic of an
autosomal recessive trait.
C. For rare traits, affected individuals have
unaffected parents.
D
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Where does the energy for ATP synthesis come from?
a. anabolism of complex molecules into simpler molecules b. catabolism of complex molecules into simpler molecules c. anabolism of simple molecules into complex molecules d. catabolism of simple molecules into complex molecules e. anabolism of complex molecules directly into ATP
A person with two X chromosomes is the homogametic sex
Indicate whether the statement is true or false
The fact that chromosomes should become shorter and shorter with each round of cell division is referred to as the ________.
a) the end-replication problem b) the replication paradox c) the truncated end problem d) shortening contradiction e) the short end hypothesis
Direction of shell coiling in the snail Lymnaea peregra is conditioned by a form of extrachromosomal inheritance known as ________
A) independent assortment B) sex-linked inheritance C) maternal effect D) heteroplasmy E) epistasis