Huntington CHOREA is a disease that is caused by a dominant allele what is the percentage chance of a child having a Selfies if both parents have the disease and are heterozygous

The probability will be 75% (each parent has one bad allele and one good allele). In consequence, the probability to have an unaffected offspring will be 25%.

Explanation:

Huntington's chorea is an autosomal dominant disease characterized by different brain disorders that include, among others, dementia, rigidity and ophthalmoplegia. Huntington's chorea is an inherited disease that is produced by the mutation on chromosome 4, thereby affecting brain functioning. This mutation is caused by a trinucleotide repeat in the HTT gene, which is a gene highly expressed in many tissues.

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.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.