Problem: OPTIONS:
- abnormalities
- clusters
- chromosonal variations
- phenotypes
Q: Answer the following question given this paragraph: Consider the following example: Suppose you have a purple and white flower and purple color ( P ) is dominant to white ( p ). The white flower must be homozygous for the recessive allele, but the genotype of the purple flower is unknown. It could be either PP or Pp . A testcross will determine the organism's genotype. The unknown genotype can be determined by observing the phenotypes of the resulting offspring. If crossing the unknown dominant phenotype ( PP or Pp genotype) individual with the recessive phenotype individual produces only dominant phenotypes (no recessive), then the unknown individual is homozygous dominant. If any recessive phenotypic individuals result from the cross, then the unknown individual must carry the recessive allele, and have the heterozygous genotype. Q: An unknown genotype can be determined by observing what, the term for characteristics of the resulting offspring? A:
Answer: phenotypes
Problem: OPTIONS:
- vacuum
- energy
- space
- matter
Q: Answer the following question given this paragraph: Making Connections: Cosmology and Particle Physics There are many connections of cosmologyby definition involving physics on the largest scalewith particle physicsby definition physics on the smallest scale. Among these are the dominance of matter over antimatter, the nearly perfect uniformity of the cosmic microwave background, and the mere existence of galaxies. Matter versus antimatter We know from direct observation that antimatter is rare. The Earth and the solar system are nearly pure matter. Space probes and cosmic rays give direct evidencethe landing of the Viking probes on Mars would have been spectacular explosions of mutual annihilation energy if Mars were antimatter. We also know that most of the universe is dominated by matter. This is proven by the lack of annihilation radiation coming to us from space, particularly the relative absence of 0.511-MeV rays created by the mutual annihilation of electrons and positrons. It seemed possible that there could be entire solar systems or galaxies made of antimatter in perfect symmetry with our matter-dominated systems. But the interactions between stars and galaxies would sometimes bring matter and antimatter together in large amounts. The annihilation + radiation they would produce is simply not observed. Antimatter in nature is created in particle collisions and in decays, but only in small amounts that quickly annihilate, leaving almost pure matter surviving. Particle physics seems symmetric in matter and antimatter. Why isn't the cosmos? The answer is that particle physics is not quite perfectly symmetric in this regard. The decay of one of the neutral K -mesons, for example, preferentially creates more matter than antimatter. This is caused by a fundamental small asymmetry in the basic forces. This small asymmetry produced slightly. Q: The lack of annihilation radiation coming to us from space proves that the universe is dominated by what? A:
Answer: matter
Problem: OPTIONS:
- sometimes
- yes
- they don't reproduce
- no
Q: Answer the following question given this paragraph: Are there male and female bacteria? Of course the answer is no. So, sexual reproduction does not occur in bacteria. But not all new bacteria are clones. This is because bacteria can acquire new DNA. This process occurs in three different ways:. Q: Do bacteria sexually reproduce? A:
Answer:
no