- AChina
- BJapan
- CJava
- DTexas
Explanation:
Java man (Homo erectus erectus or Pithecanthropus erectus), was a sub species of Homo erectus, that lived around 0.6 million years ago. His fossils have been discovered in Java. He lived in caves and used fire.
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$A$. This disorder was first described by Langdon Down $(1866)$.
$B$. Such an individual has overall masculine development. However, the feminine developement is also expressed.
$C$. The affected individual is short statured.
$D$. Physical, psychomotor and mental development is retarded.
$E$. Such individuals are sterile.
Choose the correct answer from the options given below:
Reason : No recessive individual are obtained in the monohybrid test cross.
Identify $A$ and $B$ and choose the correct option