An internal skeleton is used to help an organism hold its body up and keep from falling, while a stem stores nutrients, and produces new living tissue, and transports fluids.
Answer:
The correct answer would be
- It cures all cases of cystic fibrosis.
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It involves the modification of DNA.
- It attempts to replace a mutated gene with normal DNA.
- It does not always cure patients who use it.
Gene therapy is an experimental technique used to treat the genetic disorder by transplanting the normal gene into the cell in order to replace the missing or defective gene in a cell.
It helps in treating genetic disorders such as cystic fibrosis, hemophilia et cetera.
It can be of two types of somatic gene therapy and germline gene therapy.
Answer:
(i) An allele is a variant of a gene, can either be short or tall.
Dominant = the tall allele that "trumps" the short allele. if a dominant and recessive allele is present (heterozygous) then the dominant phenotype will be shown.
(ii) David's eyes are Brown
(iii) Sarah's eyes are blue
(iv) David - B, b
Sarah - b, b
(v) Possible genotypes include Bb and bb. These give the phenotypes of brown eyes or blue eyes.
(vi) The chance for blue eyes is 50% (or 1:1 ratio)