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genetics
test study guide
Question | Answer |
---|---|
Traits are influenced by genes and environmental factors. Explain the difference. | genes- traits passed on from parent to off spring environment- whats around you that makes up your physical appearance |
What is a carrier? | A person or organism that carries a recessive allele. |
What are the male and female sex chromosomes? | xy, xx |
How does down syndrome occur? | When a persons cells have a extra copy of chromosomes , which causes an error of meiosis. The chromosomes failed to separate. properly. |
What is sickle cell anemia? | A group of inherited red blood cells disorders. |
Describe DNA (Include its shape and what its made of) | Contains information that determines the traits that a living thing inherits. (spiral shaped)(nucleotide) |
what rules must be followed when AT CG bases are paired up | a-t c-g |
what is a karyotype? | The number and visual appearance of chromosomes in the cell nuclei of an organism . |
what is selective breeding? | The human practice of breeding animals or plants that have desired traits. |
What is inbreeding? | 2 individuals that have identical or a similar set of alleles. |
What is cloning ? | An organism that is genetically identical to the organism from what it was produced. |
What is a genome ? | The complete set of genes or genetic material present in a person or a organism. |
What was the purpose of the human genome project? | So scientist can have genetic information about humans. |
What is mutation? | A change in the nucleotide base sequence of a gene or DNA molecule. |
Describe the types of mutations that can occur | deletion insertion substitution |
What is a gene? | A unit of heredity that is passed from parent to offspring. |
What is genetic engineering? | Genes from one organism are transferred into the DNA of another organism . |
What is the difference between mitosis and meiosis? | Mitosis- cell divides to produce 2 daughter cells with the same number of chromosomes(asexual) Meiosis- produces sex cells with half the number of chromosomes as body cells(sexual) |
what is unique about a identical twin's DNA? | Identical twin's DNA are the exact same. |