Correct answer: D
A pollen is where male gametes are produced and so the number of chromosomes, as we are talking about gametes, is n. This means that the grain of pollen will only have a copy of each gene, and therefore only one allele for each gene - one S, and one T or t. So, the possible combinations are ST and St.
Answer:
Alleles that are rare in the ancestral population (Germany) become common in the new population by random chance.
Explanation:
The founder effect is the change in the allele frequencies of a population by a chance event when a small group of individuals migrate from the large original population and colonize a new region. The gene pool of the Amish population is quite different from the original population as the colonizing individuals did not carry all the alleles and genes present in the original population.
The founder effect results in the expression of harmful recessive alleles that were otherwise masked in the heterozygous genotype of the original large population. Small colonizing population exhibits increased homozygosity and reduced genetic variations leading to the expression of rare diseases that were masked by heterozygosity in the large parent population.
The interactions between the atmosphere and the cryosphere are often complex.
The deposition of atmospheric impurities has been shown to impact the radiative properties of snow and ice, enhancing their melting.
D.hot air rising and cooler air falling. A is example of radiation or conduction. B is example of radiation. C is example of conduction. D is example of convection
Physical Change, although the answer is widely disputed.
