help por favor.
2007-02-26 04:41:52 · 5 answers · asked by xillusonx08 1 in Science & Mathematics ➔ Medicine
No, only one parent needs it. Look at the show "Small people, big world" on TLC. Parents are both little people, and 1 child is also, but the other two children are full grown.
2007-02-26 04:46:25 · answer #1 · answered by James Dean 5 · 0⤊ 0⤋
In the case of achondroplastic dwarfism, the short stature is caused by a dominant mutation, hence only one copy of the gene is needed to cause dwarfism; if one parent is affected, it can be passed on to any offspring. In this specific case, two dominant copies of the gene are lethal, so you will never get a case of homozygous dwarfism. If a couple who have the same mutation have a child, the chances of the child also being a dwarf are 2/3 (since we know both of the parents must be heterozygous), and the chances of the child being normal sized are 1/3 (since there is no chance for homozygous mutation).
However, there are other causes of dwarfism, including spontaneous mutations, in which neither parent carries a mutation, or "pituitary dwarfism", in which there is a problem with growth hormone.
2007-02-26 16:42:45 · answer #2 · answered by janegalt 2 · 0⤊ 0⤋
no, i believe that only one parent needs to be a carrier. But according to the web site that i found it is more likey to be caused by a mutated gene then to be inhereted.
2007-02-26 12:59:05 · answer #3 · answered by sea_sher 5 · 0⤊ 0⤋
There are several causes of dwarfism. Which dwarfism are you asking about?
2007-02-26 12:57:04 · answer #4 · answered by yakkydoc 6 · 0⤊ 0⤋
NO. Only one.
2007-02-26 12:51:28 · answer #5 · answered by Merovingian 6 · 0⤊ 0⤋