In dogs, there is a hereditary deafness caused by a recessive allele, d. A kennel owner has a male dog that she wants to use for breeding purposes if possible. The dog can hear, but the owner is unsure of the genotype. She does a testcross (crosses it to a homozygous recessive dog), and two of the five offspring are deaf. This means that the male dog
A. has the genotype Dd
B. has the genotype DD
C. has the genotype dd
D. is actually deaf
E. is still of unknown genotype since there were offspring of both deaf and hearing phenotypes
A. has the genotype Dd
You might also like to view...
Many types of bacteria are only ________ when dispersing from more stable and heterogeneous communities known as biofilms.
Fill in the blank(s) with the appropriate word(s).
In incomplete dominance,
a. one allele is not dominant to another allele. b. the genotype can be determined by the phenotype. c. the heterozygote is somewhat intermediate to the two homozygotes. d. the intermediate phenotype may be the result of enzyme insufficiency. e. all of these are true.
If a chromosome's gene sequence is represented by the letters A-B-C-D-E-F-G before modification and A-B-C-D-LM-
N-O-P-E-F-G afterward, this would be an example of ____. a. inversion b. deletion c. duplication d. translocation e. cross over
Cilia and flagella (select all correct choices):
A. are specialized cells that move by rotary motion. B. are specialized organelles that move by rotary motion. C. are specialized organelles that propel some plant, algae, and animal cells. D. contain microfilaments arranged in nine pairs around the periphery and two microfilaments in the center. E. contain microtubules arranged in nine pairs around the periphery and two microfilaments in the center.