In tomatoes, red (R) is dominant to yellow (r), tall (D) is dominant to dwarf (d), and smooth (H) is
dominant to peach or hairy (h).
(a) How many different genotypes are there in relationship to these three characteristics?
(b) How many different phenotypes are there in relationship to these three characteristics?
(c) How many different homozygous pure-breeding forms can be produced? What will be an ideal response?
(a) 27
(b) 8
120 Chapter 13
(c) 8
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The most common leukocyte in the blood is
(a) a lymphocyte. (b) an eosinophil. (c) a basophil. (d) a neutrophil.
What anatomical features help primates to live in trees?
What will be an ideal response?
dilation of the __ causes the lacunae to fill with blood and the penis to become erect
Fill in the blank(s) with the appropriate word(s).
A mother expresses the symptoms for Huntington's disease, an autosomal dominant trait. What are the chances that her offspring would carry a mutated allele if her partner is unaffected by the disease?
A. 0–25% B. 25–50% C. 50–100% D. 75% E. 100%