Answer: Segmental duplication
Explanation:
Most of the times, segmental duplicarions occurs to preserve/conserve important regions on the chromosome to avoid extinction. If perhaps a damage occurs in one particular region that has a duplicate, the duplicate is present to help conserve the functions of the damaged regions.
Answer:
Hemophilia
Explanation:
This is a disorder in which a blood coagulation factor is missing from the blood, so if the person with the disorder gets even a small injury, he'll bleed a lot due to absence of proper blood coagulation.
It's more common in males than females because females have two X chromosomes. If they have one recessive allelle on one X chromosome, while the other has the dominant allele, they're going to be asyptomatic carriers of the recessive allele.
However, since males have only one X chromosome, having the recessive allele means that they'll suffer from hemophilia. There's no chance of them being just carriers unlike the females.
The Mesozoic era follows the end of the Paleozoic era.
Answer:
A. UUA AAG GCU UAC CCU
Explanation:
Transcription is the first process of Gene expression, which involves the synthesizing of a mRNA molecule from a DNA strand. This process (transcription) which is carried out or catalyzed by an enzyme called RNA polymerase, uses the complementary base pairing rule to synthesize nucleotides.
The complementary base pairing rule as proposed by Chargaff states that Adenine base (A) should bond with Thymine base (T). Likewise for Guanine (G) and Cytosine (C). Hence, in a DNA strand with sequence: AAT TTC CGA ATG GGA, the following RNA will result:
UUA AAG GCU UAC CCU.
Note that, Uracil base replaced Thymine base in the mRNA molecule.
Since; A-U and G-C
AAT TTC CGA ATG GGA ---------- DNA
UUA AAG GCU UAC CCU --------- RNA
