Which of the following is a characteristic only found in eucoelomates?
a. a true coelom
b. a digestive cavity
c. an ectoderm
d. a mesoderm
a. a true coelom
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In a given population of Drosophila, curly wings (c) is recessive to the wild-type condition of straight wings (c+)
You isolate a population of 35 curly winged flies, 70 flies that are heterozygous for straight wings and 45 that are homozygous for straight wings. What is the total number of alleles in the gene pool? A. 2 B. 150 C. 230 D. 300 E. 140
Frameshift mutations change the number of ____ in the gene and usually cause large-scale changes in the ____
sequence of the protein. a. polypeptides; nucleotide b. amino acids; allelic c. alleles; amino acid d. nucleotides; amino acid e. amino acids; nucleotide
In the multiple allelic system for eye color in Drosophila, the phenotypic expression of the alleles depends on
A) how much pigment is produced by the alleles present. B) the interaction of alleles from two different genes. C) the temperature at which the flies are grown. D) the sex of the fly. E) Both A and B
An inactivating mutation in the progesterone receptor gene would likely result in _____
A) the absence of secondary sex characteristics B) the inability of the uterus to support pregnancy C) enlarged and hyperactive uterine endometrium D) the absence of mammary gland development