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Blume CH 5 #27-40
Question | Answer |
---|---|
A person with phenotype A blood has how many possible genotypes? | two |
A person with phenotype O blood has how many possible genotypes? | one |
Type O blood is dominant or recessive? | recessive |
Genes on chromosomes control the _______ that show up in an organism. | traits |
During _______, a pair of chromosomes separates and the ________ move into separate cells. | 1. meiosis 2. alleles |
The study of how traits are inherited is __________. | genetics |
The different forms of a trait that a gene may have are _________. | alleles |
An allele inherited on an X or Y chromosomes is a __________________. | sex-linked gene |
For humans, XX is a ________ and XY is a __________. | 1. female 2. male |
_____________ are genes that are altered or copied incorrectly. | mutations |
How is it possible for 2 parents with brown eyes to have a child with blue eyes? | They would be heterozygous for brown eyes. This means there is a 25% chance of the child having blue eyes when you make a Punnett square for the parents. |
What chromosome disorder causes Down Syndrome? | It is caused when a person inherits 3 chromosomes for chromosome pair # 21. |
How do scientists make a bacteria cell produce insulin needed by Type 1 diabetics? | They take out a portion of DNA from a bacterium, and scientists replace that cut out spot with an insulin allele. That way when the bacterium reproduces, it produces insulin. |
How is gene therapy used to help cystic fibrosis? | It is used because the virus implanted with normal genes, DNA, and RNA invades a cell and lets out the normal gene into it. This can help with producing medicines to help stop cystic fibrosis. |