Down syndrome (trisomy-21 ) is the only human autosomal trisomy in which the individuals may survive to adulthood
Indicate whether the statement is true or false
TRUE
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What type of enzyme regulation is illustrated here?
a. allosteric inhibition
b. allosteric activation
c. feedback inhibition
d. dehydration inhibition
The seed plants became dominant in the late ___ when the climate became ___.
a. Cambrian---wetter b. Carboniferous---drier c. Carboniferous--wetter d. Cretaceous---drier e. Cretaceous---wetter
What is the -35 consensus sequence for the following sequences?
A) TTGATA B) TATGAT C) TATTAT D) ACAA E) TAGTAT
Why are X-linked recessive genetic disorders more commonly seen in males?
a. For an X-linked disorder to occur, an individual must receive one allele only found on the X chromosome and a second allele found only on the Y chromosome, which females do not have. b. Females must receive two copies of the recessive allele to exhibit the disorder, but males need only one copy. c. The alleles of sex-linked genes are carried only on the Y chromosome, which females do not have. d. Females only have X chromosomes and genes on the X chromosome are not expressed.