The diagram shows a section of the karyotype from a human donor. Chromosome pairs 19 through 22 are labeled.

The diagram shows human chromosomes numbers 19, 20, 21, and 22. Three #23 chromosomes are present. Numbers 19, 20, and 22 show a pair each.

Which statement describes the gametes that joined together to form this karyotype?
A. The gametes formed normally, and then one chromosome was added when they joined together.
B. The gametes formed normally, and then one chromosome split apart when they joined together.
C. One gamete formed abnormally because a pair of homologous chromosomes failed to separate.
D. Both gametes formed abnormally because in each gamete, one pair of homologous chromosomes failed to separate.

A3-year-old child with nephrotic syndrome has been receiving prednisone for 1 week. the nurse reviews the child's progress record and determines that the medication has been effective. what information supports this conclusion? select all that apply.

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

In 1959, doctors began using the powerful antibiotic methicillin to treat infections of staphylococcus aureus, but within two years, methicillin-resistant strains of s. aureus (mrsa) appeared. how did the resistant strains of s. aureus emerge? in 1959, doctors began using the powerful antibiotic methicillin to treat infections of staphylococcus aureus, but within two years, methicillin-resistant strains of s. aureus (mrsa) appeared. how did the resistant strains of s. aureus emerge? staphylococcus aureus bacteria that were able to synthesize cell walls using a protein that was not affected by methicillin survived the methicillin treatments and reproduced at higher rates than did other individuals. over time, these resistant individuals became increasingly common. in response to treatment of staphylococcus aureus infections with methicillin, some bacteria began to synthesize cell walls using a protein that was not affected by methicillin. these bacteria survived the methicillin treatments and reproduced at higher rates than did other individuals. over time, these resistant individuals became increasingly common. in response to treatment of staphylococcus aureus infections with methicillin, bacterial populations gradually began to synthesize cell walls using a protein that was not affected by methicillin.