Answer:
lethal
Explanation:
The genotype mm corresponds to normal length tails. On the other hand, the genotype MM corresponds to having highly abnormal brains as well as spinal cords .
Lethal alleles are the alleles which can cause death of organism. These alleles are usually result of the mutations in the genes which are essential for the growth or the development. Thus, Marble has genotype Mm and have one copy of dominant lethal allele as M corresponds to premature death.
By 1866<span> all states were readmitted into the Union. </span>
The Radical Republicans believed blacks were entitled to the same political rights and opportunities as whites. They also believed that the Confederate leaders should be punished for their roles in the Civil War. Leaders like Pennsylvania REPRESENTATIVE THADDEUS STEVENS and Massachusetts SENATOR CHARLES SUMNER vigorously opposed Andrew Johnson's lenient policies. A great political battle was about to unfold.
Americans had long been suspicious of the federal government playing too large a role in the affairs of state. But the Radicals felt that extraordinary times called for direct intervention in state affairs and laws designed to protect the emancipated blacks. At the heart of their beliefs was the notion that blacks must be given a chance to compete in a free-labor economy. In 1866, this activist Congress also introduced a bill to extend the life of the Freedmen's Bureau and began work on a CIVIL RIGHTS BILL.
<span>D. to increase rapid construction of railroad lines.</span>