Test 5 Flashcards
Which blood group can receive blood from anyone?
Group AB
If your mother is blood group B and your father is blood group AB, which blood group could you not have?
Group O
DNA polymerase enzyme starts at the — of the original DNA
3’ end (3 prime)
What is aneuploidy?
A cell inherits the wrong number of chromosomes
What is a disadvantage of fetal testing?
Can cause miscarriage 1-2% of the time
When did Barbara McClintock show that genes were on chromosomes?
1941
Give an example of aneuploidy where the person has only 45 chromosomes
Turner syndrome
Which genetic disease affects the lungs?
Cystic fibrosis
Which chromosome carries the gene for sickle cell anemia?
Chromosome 11
Which of the following couples is most likely to have a baby with Down syndrome?
Father aged 24, mother aged 33
Which drug prevents Rhesus problems?
Rhogam
If you are blood group B, what two genotypes could you have?
I^B I^B or I^B i
If you are Rhesus factor positive, and homozygous, what percentage of your children will be Rhesus negative if your spouse is Rhesus negative?
75%
What antibodies are there in the blood of someone who is blood group O?
Anti-A and anti-B
Huntington’s disease affects the — and is caused by a gene on chromosome —.
Nerves,
4
Which enzyme joins together the Okazaki fragments?
DNA ligase
Which scientist showed that DNA is the genetic material of some viruses?
Chase
What does pathogenic mean?
Disease causing
Which of the following is true for a trait caused by a dominant gene?
If you have that trait, one of your parents must have that trait
People with genotype XYY suffer from — syndrome.
Jacobs
In chorionic villus sampling, cells are removed from the
Placenta
The structure of DNA was worked out in 1953 by Francis Crick, James Watson, and
Rosalind Franklin
What does semi-conservative mean, in respect to DNA replication?
Each new pair of DNA strands contain one old strand and one new one
If your father has Huntington’s disease, and is heterozygous, and your mother is normal, what is the risk that you will inherit the disease?
50%
Frederick Griffith did an experiment in 1928 with — that showed that —.
Streptococcus,
Chemicals can change cells to different types
