Blog

Fine spines (q), smooth fruit (s), and uniform fruit color (t) are three recessive traits in cucumbers, the genes of which are linked on the same chromosome. A cucumber plant heterozygous for all three traits is used in a testcross and the following progeny (recessive alleles from the tester do not show) are produced from this testcross:   Q S T :    3 q  s t:       2 q  s T:    135 Q S t:     140 Q s T:     22 q S  t:     21 q S T:     40 Q s t:      37 Total:     400   Which progeny reflect the parents?  

Barr bodies are _____________.

Which of the following factors does not alter the Hardy-Weinberg Equilibrium?

There are 2 genotypes at a locus encoding an enzyme in a Jack Russell Terrier population in Florida. The observed phenotypes:             Rough coat: 150             Smooth coat: 150 Is the Jack Russell Terrier population in HWE at this locus?     

Refer to Figure 5.  This figure shows details of the kidney. Fill in the following blanks to describe the process of urine production. Numbers from the figure do NOT need to be included for credit.  Blood must first enter the kidney through the [a] (specific blood vessel) at the renal pelvis.  Urine begins forming when plasma is filtered through the [b] (specific blood vessel). Metabolically important molecules are first reabsorbed into the body along the [c] (part of the nephron). From there, the fluid moves into a section of the nephron which only allows reabsorption of water. This is countered by electrolyte reabsorption in the [d] (part of the nephron). Finally, fluid from multiple nephrons is collected into the [h] (part of the nephron) where final modifications to the urine are made, including pH adjustments using the enzyme [i]. 

Refer to Figure 5.  This figure shows details of the kidney. Fill in the following blanks to describe the process of urine production. Numbers from the figure do NOT need to be included for credit.  Local blood flow for urine production is controlled by juxtaglomerular cells located around the [a] (specific blood vessel).  Urine begins forming when plasma is filtered through the [b] (specific blood vessel). Metabolically important molecules are first reabsorbed into the body along the [c] (part of the nephron). From there, the fluid moves into the [d] (part of the nephron) which only allows reabsorption of water. This is countered by electrolyte reabsorption on the opposite side. Finally, fluid from multiple nephrons is collected into the [h] where final modifications to the urine are made, including pH adjustments using the enzyme [i]. 

Refer to Figure 5.  The histology sections at the bottom of this figure come from two different regions of the kidney showing different structures of the nephrons and associated blood vessels.  NAME Kidney region A: [a] NAME Kidney region B: [b] Identify TWO structures found in A but not in B: [c]

Refer to Figure 1.  The model labeled B shows organs of the respiratory tract that contain cartilage, but specific types of cartilage have different functions.  What type of cartilage is present in organ #12? [a] What is the function of this cartilage? [b]

Refer to Figure 4.  Each of the histology sections labeled A through K includes both a ‘zoomed out’ view of the organ to show important tissue structures and diameters of these ‘tubes’ as well as a ‘zoomed in’ view below it to show the detail of the epithelial linings in these tubes.  Fill in each of the blanks to NAME the organs for the labeled tissue sections. 1/2 credit if you name the correct organ system but not the correct organ.  Organ Section A: [a] Organ Section B: [b] Organ Section D: [d] Organ Section F: [f] Organ Section H: [h] Organ Section K: [k]

Refer to Figure 1.  The head model in sagittal view (A) has organs from both the respiratory and digestive tracts. Using your knowledge of these systems and the typical materials moving through these passageways, identify the TYPE OF EPITHELIUM that would be found at the numbered locations below Epithelium at Site 1:  [1] Epithelium at Site 5:  [2] Epithelium at Site 8:  [5]