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1. A holandric trait is a. carried on the X chromosome b. expressed only in females c. the result of a mutant autosomal gene d. caused by a Y-linked gene e. none of the above   2. An organism is diploid with an XXY sex chromosome complement. It would be […]

Dig Deep into the interactive tree of life 1. First watch the video- Ghosts of Evolution- https://youtu.be/ZWW5OuxlKec Then use the Interactive Tree to trace human ancestry- (type humans into the search bar) Note that Homo Sapiens is the only surviving species of the genus Homo • Create a document and […]

1. Biology is the study of life. What is life as described by a biologist?2. Explain the scientific method.3. Scientists describe evolution as the unifying concept of biology. Theodosius Dobzhansky said, “nothing in biology makes sense except in the light of evolution. Explain the role on evolution as the corner […]

Parents were concerned about their 16-year-old son for the following reasons: he had no deepening of his voice, scanty pubic and axillary hair growth, absence of beard and mustache growth, small penis, poor muscular development, and psychosocial immaturity. Laboratory evaluation indicated the following: Serum testosterone 100 ng/dL Sperm count 10 […]