A certain organism has a mutation in the shelterin gene that makes it non-functional. Which of the follow consequence would you expect from this mutation?
a) Nucleosomes would not be formed so DNA can not be compacted as tightly.
b) Epigenetic control would not be possible.
c) The phosphodiester bonds between nucleotides would not be formed.
d) DNA could not be repaired if it underwent damage.
e) The telomere overhand region would become accidentally repaired, thus lengthening the chromosomes unintentionally.
Ans: e) The telomere overhand region would become accidentally repaired, thus lengthening the chromosomes unintentionally.
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There are no known human diseases that have been linked to prions.
Answer the following statement true (T) or false (F)
Most hospitals in the United States routinely test all newborns for ____, an autosomal recessive disorder in which a
metabolic abnormality causes a buildup of compounds that damage brain tissue and can lead to mental retardation unless a restricted diet is followed
a. Duchenne muscular dystrophy b. phenylketonuria c. achondroplasia d. sickle-cell anemia e. cystic fibrosis
This karyotype shows that the individual:
1.is male
2.is female
3.has 21 pairs of autosomes and 2 pairs of sex chromosomes
4.has 23 pairs of autosomes
The human population will be in the stable equilibrium phase when the number of births ____ the number of deaths.
A. is greater than B. equals C. is less than D. is half