Color blindness is an X-linked recessive gene. Two normal-vision parents produce a color-blind child
(a) Is this child male or female?
(b) What are the genotypes of the parents?
(c) What are the chances that their next child will be a color-blind daughter? What will be an ideal response?
(a) male
(b) Cc ? CY
(c) no chance to produce a color-blind daughter
You might also like to view...
Who believed that once a mature community was established, its species composition was at equilibrium?
a. Clements b. Gleason c. Darwin d. Whittaker e. Connell
Which statement about plant hormones is NOT true?
A. Responses to plant hormones may be observed in nearly any part of a plant. B. Plant hormones include at least one form that is a gas. C. Each naturally occurring hormone has a specific chemical structure. D. All known growth regulators of plants are chemicals produced naturally in plants. E. Hormones are among the principal internal regulators of plant growth.
The temperature is nearly uniform throughout a lake
A. at all times due to winds causing constant mixing of the layers. B. never. The lake always has different temperature layers and they are reversed in winter and summer. C. during winter when the ice forms an insulating cover. D. by the end of the fall and spring overturn. E. during summer when the sunlight warms the surface and the wind mixes the layers.
What is the function of an acrosome?
A) It protects the sperm from vaginal secretions. B) It contains a haploid nucleus. C) It holds large numbers of mitochondria. D) It propels the sperm through the female reproductive tract. E) It contains enzymes that dissolve the protective layers around the egg.