The answer is B (example: color blindness)
Answer:
The F1 progeny is completely heterozygous for the <em>loci</em> of interest since they were obtained by mating between two pure-breeding plant lines. In the next generation, the backcross progeny will have homo-zygous individuals and therefore they will be more variable, resulting from meiosis in F1 hybrids
Explanation:
An F1 resulting from the cross between two pure-breeding plant lines will produce all hybrid individuals, all of them genetically (and phenotypically) identical. Meiosis in F1 hybrids is well known to produce homo-zygous genotypes and thus increases genetic diversity in progeny. For instance, for a single <em>locus</em>, the expected ratio of genotypes obtained from crossing two heterozygous parents is 1:2:1, i.e., one homo-zigous dominant individual, two heterozygous individuals (genetically identical to the parents) and one homo-zygous recessive individual; while the expected phenotypic ratio is 3:1 (i.e., 3 dominant expressing: 1 recessive expressing).
This is because some of the trisomies (one extra chromosome, three instead of two) are fatal, births cannot survive.
Theoretically, trisomies can occur with any chromosome, but often result in miscarriage.
The types of autosomal trisomy that survive to birth in humans are:
Trisomy 8 or Warkany syndrome 2
Trisomy 9
Trisomy 13 or Patau syndrome
Trisomy 18 or Edwards syndrom
Trisomy 21 or Down syndrome.
The most accurate answer is C.
The cytoskeleton is responsible for cell shape, motility (movement) and motility of organelles within a cell.
Unlike the human skeleton , the cytoskeleton is extremely dynamic, meaning the filaments that make up the cytoskeleton are able to shorten or lengthen very rapidly.
This dynamic nature is necessary for cells to be able to change shape, complete cell division, or migrate (move from one place to another).The cytoskeleton connects to every organelle and every part of the cell membrane.
If you want a complete protein in one food, tofu is probably your best bet. However, since you're probably not going to want to eat that every day, the best thing to do is eat a variety of high protein foods. Mix your proteins in order to get complete proteins. So, have say a grain (quinoa, millet, or brain rice are good) and have it with beans, or tempeh, or seitan, or nuts, etc. If you search for specific foods on that site, it'll show you which of the amino acids that food contains, and let you search for foods with complementary proteins. So if you want to be extra sure you're getting enough complete proteins, check what you're eating to see the amino acids in all of the different foods.