Mark and Annie are wondering if they are siblings, so the family gets a DNA test done. Here are their results:  Based on this STR analysis, can you conclude that Mark and Annie are siblings? Why or why not? Fully explain your answer.  

Mitochondrial DNA can be easily extracted and assembled, because of its size and because each cell carries thousands of copies. A man who carries a disease associated with a mitochondrial gene sees a genetic counselor to determine the chances his offspring will carry the disease. What % of his offspring will express this disease? 

Which of the following is true about the operator and the promoter in gene regulation?

What is the recombination frequency of the cross from the question above?

What would be the consequences of a two nucleotide-deletion mutation in the middle of the first exon of a protein-coding gene?

2.2 Verwys na die addendum en gebruik Figuur 2.2 wat Huiswaterrivier aantoon om die volgende vrae te voltooi. 2.2.1 a. Identifiseer die dreineringspatroon wat by A gevind word.  (2)

1.1.4 Teken ‘n dwarsaansig van die weerstelsel in figuur 1.1 vanaf C na D en benoem die volgende: a. Temperature (warm / koud) b. Hoof-wolktipe c. Tipe neerslag (5)

Protection of the membrane of eardrum from outside dangers is a function of                    .

A 20 week ultrasound revealed brain tissue floating in amniotic fluid.  The following image was taken.  What is the most likely diagnosis? 

What does the yolk sac produce?