Answer:
The blonde hair would be the recessive trait and both the parents must be heterozygous dominant.
For instance, let us consider B and b the alleles of the gene responsible for the color of the hairs.
B is the dominant allele which codes for the brown color whereas b is recessive allele which codes for blonde hairs.
The phenotype of both the parents is a brown color, that is, dominant trait. They genotype would be Bb.
The cross would produce offspring with three possible types of genotypes BB, Bb, and bb in the ratio 1:2:1.
The offspring with BB and Bb genotype would have brown hair color and the offspring with bb would have blonde hair color.
Relying on a short list of major food crops is a concern.
Explanation:
Different food crops require different types of soil. Thus all kinds of food crops cannot be cultivated in the soil of a country. In addition to that the amount of land available for cultivation is limited by growing settlements and industries.
Thus growing reliance on limited number of food crops is a serious issue. When all the people start depending on a few type of major food crops the production from agriculture won’t be able to feed all the population. The increase in demand for major food crops will result in the increase in their prices.
This would mean that only the wealthy would be able to afford them. This will eventually lead to poverty and decline in economic growth.
Answer:
In anaphase I, homologous pairs are separated but sister chromatids stay joined together.
Answer:
the end results of mitosis and meiosis are completely different: Mitosis: One diploid cell → two diploid cells. Goal is cell division. Meiosis: One diploid cell → four haploid cells.
Explanation:
B) the relative age of the rock
C) the absolute age of the rock
D) the level of radioactive isotope decay in the rock-
-At first I thought it was the date the rock was formed...But I think it wrong, so I looked over the text and now I'm thinking they want it to answer eider B-C relative or Absolute age of the rock. So I can cross off A and D. And by doing that, I had to take a look into my notes, and I notice my notes aren't the best but from what I know, Absolute determines whether it gives up the true ‘age’ of a rock or fossil. And Relative doesn't provide a “true age’’... But now that I'm thinking on it absolute looks to see if it mainly organic or tissue, while Relative mainly sedimentary rocks. So I'm thinking it B now, but I feel like I'm confusing myself with all this. So I wanted to understand this better and get a clear answer to this. If my answer wrong, can I get a short explanation as to why?-
Answer:
Types of variation in genetics
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring)
other answer
There are three sources of genetic variation: mutation, gene flow, and sexual reproduction. A mutation is simply a change in the DNA. Mutations themselves are not very common and are usually harmful to a population. Because of this, mutations are usually selected against through evolutionary processes