There is a color pattern inherited in certain mice in which agouti (gray) is homozygous, and yellow is
heterozygous. A cross of two yellows produces two yellows for each agouti. A second gene, C/c,
controls the expression of the color genes: C is the dominant allele that allows color to be expressed,
and the recessive gene in the homozygous condition (cc) prevents any color from being expressed.
(a) Give the genotypes of a white parent crossed with a yellow parent that produces 1/2
white, 1/3 yellow, 1/6 agouti offspring.
(b) Give the results of the cross of two forms heterozygous for each gene.
(c) Can you develop a pure-breed population for any of the colors? What will be an ideal response?
(a) Yy Cc ? Yy cc
(b) Yy Cc ? Yy Cc ? 3/12 YY C_ agouti, 6/12 Yy C_ yellow, 3/12 _cc albino
(c) white and agouti
You might also like to view...
Dilation of a precapillary sphincter ____ blood flow through the capillary bed
Fill in the blank(s) with the appropriate word(s).
Novocain would work at which point in Figure 41-3?
a. 1
b. 2
c. 3
d. E
e. 4
Microbes are sometimes used in secondary treatment of wastewater to
A) convert heavy metals into carbon dioxide. B) remove organic matter. C) remove large particles. D) convert heavy metals into carbon dioxide, remove organic matter, and remove large particles.
Biologists use nomenclature or the binomial to provide each species with a unique scientific name. Our species is called Homo sapiens. The first word refers to which taxonomical grouping?
A. Kingdom B. Phylum C. Order D. Genus E. Species