In: Biology
The following statements apply to concepts and material discussed in Chapter 6; identify which statement is TRUE. |
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Q1)
Answer a) False. X inactivation don't happen in males since they have only one X chromosome acquired from mother.
b)False. PAN syndrome is an autosomal recessive inheritance. It is not sex linked.
c)False. X chromosomes not only contain genes for female characters. It also contains important genes required for survival.
d)True. X linked dominant condition is commonly seen in females than males. But compared to recessive traits , they affect almost 50% of individuals from affected parents.
Q2)
a.False. the strands are in the opposite direction and antiparallel
b)True. DNA is directional and addition of nucleotides happen from 5' to 3'.
c)False. DNA polymerase corrects most of the errors. Some of them are missed. They lead to mutations.
d)False. DNA replication only needs to happen when cells divide.
e)True. DNA replication is conserved because the two strands each give rise to a daughter strand and therefore the parent strand is conserved.