In cats the allele B produces black, whereas b
produces yellow. Neither gene is dominant, and in
the heterozygous state the phenotype is a
combination of yellow and black spots called
tortoiseshell. The alleles B and b are X-linked. If a
tortoiseshell cat has three tortoiseshell kittens and
two black kittens, give the genotype and phenotype
of the tomcat that produced them, and give the sex of
the kittens. What will be an ideal response?
Answer: BY black, tortoiseshell female, black males
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All of the following are functions of the cell membrane EXCEPT:a
transmitting signals. b. participating in energy transfer. c. being freely permeable to all substances. d. regulating the passage of materials. e. participating in chemical reactions.
In this figure, the slope of the lines for active lizards and inactive ones suggests that
A) active lizards are regulating their temperature in some way. B) inactive lizards are regulating their temperature in some way. C) there is no difference in trends between the two types. D) active lizards retain their cool across a wider variety of temperatures.
Comparing a single-celled eukaryotic organism with a multicellular organism such as yourself identify the major difference from the list below.
a. Escape from predator b. Finding a mate c. Division of labor d. Find its own food e. Nucleus
A sample placed into fresh medium is initially in the (lag/log/stationary) phase of microbial growth in most instances.
Fill in the blank(s) with the appropriate word(s).