Part B Flashcards
What are characteristics that are visible called?
Phenotype
What is polydactyl?
It is when you have extra fingers or toes and is caused by a dominant allele (an alternative form of gene)
What is genetic screening?
The study of a person’s DNA in order to identify genetic difference
Name one type of genetic screening and the positives and negatives
Amniocentesis-
+= diagnose if your future child will have a genetic disease
-= every 1 out of 100 women have a miscarriage
costs £600
late abortion
What is the process of PGD?
Take a cell out of a 2-3 day old embroyo, when it is at the 4-8 cell stage and test the cell for the presence of various genes
What is cystic fibrosis?
It is a recessive disease that affects the lungs and mucus build up
Why is it that cannot get two y’s in an egg chromosome?
In an egg there is only x chromosomes as the male sperm contains both the x and y chromosome
What is a hermaphrodite?
It is when someone posses both female and male characteristics and genitals.
What are the genes that control the characteristics?
Adenine Nucleotide, Thymine Nucleotide, Cystosine Nucleotide and Guanime Nucleotide
How do the genes fit together?
A+T, G+C
What genes are the backbone of DNA?
Deoxyribose and phosphate
