In X-linked inheritance, the gene for albinism is located on an X chromosome. If the father is normal and mother is a normal carrier, the chance (percentage) for the child to be an albino child (phenotype) is:
a. 0%
b. 25%
c. 50%
d. 75%
e. 100%
Ans: b. 25%
You might also like to view...
If your urine contains fewer potassium ions than your filtrate, then the potassium has been:
A. filtered and secreted. B. filtered and reabsorbed. C. filtered only. D. secreted only.
The rete testis is connected to the epididymis by
A) efferent ductules. B) the spermatic cord. C) the tunica albuginea. D) the tunica vaginalis. E) the straight tubules.
Where do some preganglionic fibers that travel via the pelvic nerves synapse?
A. Prevertebral ganglia B. The hypogastric plexus C. Sympathetic chain ganglia D. The sacral plexus E. The abdominal aortic plexus
A skateboarder falls and lands directly on his buttocks and lower back. He does not feel much pain and continues skating. After a couple of days he begins experiencing right hip pain and notices his right foot and leg are rotated to the right. A doctor diagnoses a muscle spasm. Which of the following muscles is most likely causing the leg and foot rotation?
A. Quadratus lumborum B. Tibialis posterior C. Piriformis D. Adductor longus E. Sacrospinalis