While doing a pedigree analysis of a European royal family, you notice a disease in a female child of two healthy parents. There are also some cousins with the same genetic disease
If
this disease is controlled by a single gene, then the most likely explanation for these
observations would be:
A. the disease is a spontaneous mutation.
B. the disease is recessive and only seen in
homozygous recessive individuals such as
the daughter.
C. the disease is dominant and only seen in
homozygous dominant individuals such as
the daughter.
D. the disease is only seen in heterozygous
individuals such as the daughter.
E. the disease is dominant and is seen in
homozygous dominant or heterozygous
individuals.
B
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Polyandry is the mating system in which ____
a. one male and one female form a long-term association b. both males and females mate with multiple partners c. one male mates with many females d. one female mates with many males e. both males and females provide care to offspring
The fluid immediately surrounding the human
embryo is contained in the a. allantois. b. placenta. c. chorion. d. amnion. e. yolk sac.
Usually, a river ________ at its source compared to farther downstream
A) has less phytoplankton B) is warmer C) is wider D) flows more slowly
Work by (Ehrlich/Koch/Pasteur) contributed to the foundation of immunology, the study of the body's defenses against disease.
Fill in the blank(s) with the appropriate word(s).