Your parents are both heterozygous for the recessive disorder phenylketonuria (PKU). What is the
probability that you will have the disorder?
a. 25% regardless of the health of your 3 siblings
b. 50% no matter whether or not you have siblings
c. 75% no matter whether or not you have siblings
d. 100% even if you are an only child
e. 25% but only if your three siblings are healthy.
A
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The amniotes include (select all that apply)
A. sharks B. amphibians C. reptiles D. birds E. mammals
Grasses are usually the first plant species to colonize sand dunes
Indicate whether the statement is true or false
Which of the following best describes advantages conferred by compound leaves versus simple leaves?
a. There's a greater chance of capturing photons in intermittently shady areas. b. There is less chance of damage in high-wind areas. c. There's a reduced chance of herbivory. d. There is less surface area for water loss. e. There's a greater chance of capturing photons in intermittently shady areas and less chance of damage in high-wind areas.
In metaphase I ________ are aligned along the metaphase plate, and in metaphase II ________ are aligned along the metaphase plate
A) homologous chromosomes; tetrads B) homologous chromosomes; pairs of sister chromatids C) maternal chromosomes; paternal chromosomes D) pairs of sister chromatids; homologous chromosomes