Cystic fibrosis (CF) is a disease caused by a recessive allele, and the disease appears only in the homozygous recessive genotype. Two parents do not have cystic fibrosis, but they produce a child with this disorder. Fully explain what has occurred,
using the appropriate terminology and diagram (you must provide this diagram).
What will be an ideal response?
In this case, both parents must have been heterozygous for cystic fibrosis (Cc). The student should draw a Punnett square and obtain a 3:1 phenotypic ratio. There is a 25 percent chance that these heterozygous parents will produce a homozygous recessive child with CF.
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What is/are the variable structure(s) of a nucleotide?
A) the phosphate group B) the sugar C) the base D) the sugar and the base
Which of the following exist as RNA surrounded by a protein coat?
A. Retrovirus B. prion C. Prokaryote D. Spirochete E. streptococcus
The process where organisms act to maintain a relatively stable internal environment is ________.
Fill in the blank(s) with the appropriate word(s).
Facilitated diffusion is a type of
What will be an ideal response?