The Y chromosome was challenging to sequence because

A) it is very small.

B) the sequence has many sites of high symmetry called palindromes.

C) it is very similar to the X chromosome.

D) not enough men volunteered to have their Y chromosomes sequenced.


B) the sequence has many sites of high symmetry called palindromes.

Biology & Microbiology

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Coenzymes that bind tightly to enzymes are called ____

a. cofactors b. appendages c. regulatory groups d. prosthetic groups e. magnetic groups

Biology & Microbiology

In corn, having ligules (L) is dominant to liguleless (l), and green leaves (G) is dominant to white leaves (g). If a pure-breeding liguleless plant with green leaves is crossed to pure-breeding plant with ligules and white leaves, predict the proportion of F2 progeny with the genotype Ll gg.

A) 1/16 B) 1/8 C) 1/4 D) 1/2 E) Cannot be determined

Biology & Microbiology

Lamarck's theory of evolution was based upon 

A. polyploidy. B. geographic isolation. C. macroevolution. D. acquired characteristics.

Biology & Microbiology

Blood pressure drives the first step in urine formation, called _____________________.

A. tubular reabsorption B. antidiaresis C. tubular secretion D. glomerular filtration E. aldosterone processing

Biology & Microbiology