The following pedigree tracks sickle cell disease through three generations of a family. Use the pedigree to answer the following questions

See the answer with the explanation below.

Explanation:

Assuming the allele for sickle cell disease is represented by S and the alternate, non-sickle cell version is A; AA would be homozygous normal, AS would be heterozygous normal, and SS would be a sickler.

a. The genotype of the father in the first generation would be AS.

The father is heterozygous, since the mother is affected and the couple produced an affected child. The cross can be illustrated thus:

AS (father)   x   SS (mother) = AS, AS, SS, SS

b. The genotype of the daughter in the second generation would be SS since she is phenotypically affected for the disease.

c. The genotype of individual 3 in the second generation would be heterozygous, AS.

The cross between the the heterozygous normal father and the sickler mother can only produce one of heterozygous normal individuals or sickle cell diseased individuals. Hence, individual 3 has to be heterozygous since he appeared phenotypically normal in the pedigree.

answer: tributaries flow into rivers.

wetland is a biome that develops when the water gets accumulated in a land exhibiting a huge depression. these form either seasonally or permanently. the water in the wetland comes from rivers, lakes, ocean, flood, rain or other sources. the wetlands includes mangroves, marshes and peatland.

tributaries flow into the rivers develops a wetland because such water will get deposited in the depression and will restrict the original flow of tributary water. hence, water with low drainage current combines with the river water.

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in