The two-factor crosses performed by Mendel support the observation that
A. alleles for a given trait are distributed randomly among an individual's gametes independent of the alleles for other traits.
B. traits that are encoded by genes on different chromosomes are never found within the same gamete.
C. the F1 generation can display phenotypes in combinations different from those seen in the P generation.
D. the F2 generation will only display phenotypes in the same combinations as the P generation.
E. self-fertilization of the F1 generation will produce 100% heterozygous plants at both loci.
A. alleles for a given trait are distributed randomly among an individual's gametes independent of the alleles for other traits.
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A new species of aquatic chordate is discovered that closely resembles an ancient form. It has the following characteristics: external armor of bony plates, no paired lateral fins, and a suspension-feeding mode of nutrition. In addition to these, it will probably have which of the following characteristics?
A) legs B) no jaws C) an amniotic egg D) endothermy
Sound frequencies are measured in hertz (cycles per second). The more cycles per second, the higher the pitch. The wife of the 50 year old carpenter says that her husband is hard of hearing and should see a doctor. The husband says there’s nothing wrong with him, he just has trouble with high-pitched, female voices. Based on the data, who is right?
1.The wife; her husband does indeed have a reduced ability to hear across a range of sounds.
2.The husband; his hearing loss is only in the higher frequencies.
For each glucose molecule that begins cellular respiration, the citric acid cycle must turn once
__________________ Indicate whether the statement is true or false.
What do hydropower and wind power have in common?
A. Both require the building of dams. B. Both lead to an increase in greenhouse gas emissions. C. Both result in the depletion of fossil fuels. D. Both require the use of photovoltaic cells. E. Both are renewable energy sources.