15) SOLAR NEBULA HYPOTHESIS
This hypothesis describes how our solar system was formed from a nebula cloud.
It postulates that this cloud was formed from a collection of dust and cloud
16) LINES OF LONGITUDE
These are the geographic coordinates that shows the east-west position of a point on the surface of the earth
17) A topographic map can be distinguished from other maps because of its contour lines that show elevation and because of its great detail.
The mantle is the mostly-solid bulk of Earth's interior. The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth's total volume.
Answer:
The frequency of GTG codon in the β-hemoglobin gene among African Americans is 0.0025.
Explanation:
The sickle cell anemia is an autosomal recessive disorder that is only individuals with two recessive alleles are affected. The genotype of normal individuals is AA and carrier with genotype Aa. The diseased individual have aa genotype. The frequency is calculated using Hardy Weingberg principle, p2 + 2pq + q2 = 1 where p is frequency of allele A and q is frequency of allele a. The frequency of diseased individual (aa), that is q2 = 1/400, so, q = 0.0025. The GTG codon in the β-hemoglobin gene among African Americans is responsible for diseased condition. Thus, the frequency is 0.0025.
The gametes produced by critters with 2 genes. If the genotype is "Aa, Bb", then 4 different kinds of gametes can be made: (aB, AB, ab, and Ab) A creature with 2 heterozygous genes is called a "dihybrid."
