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EOC Review pt. 4
| Question | Answer |
|---|---|
| What stage does the cell spend most of it's life in? What does the cell do during this time? | Prophase, centrioles separate and spindles form. |
| What is the difference between mitosis and cytokineses? | Mitosis is the division of the nucleus and cytokineses is the division of the cytoplasm. |
| What is cancer? What are some causes of caner? | Uncontrolled cell division, if their is a supply of nutrients |
| How does Mitosis reproduce? | Asexually |
| How does Meiosis reproduce? | Sexually |
| How many chromosomes are produced during Mitosis? | 2N= Diploid |
| How many chromosomes are produced during Meiosis? | 1N= Haploid |
| How many cell divisions are in Mitosis? | One |
| How many cell divisions are in Meiosis? | Two |
| How many cells are produced during Mitosis? | 2 |
| How many cells are produced during Meiosis? | 4 |
| What type of cells are produced during Mitosis? | Identical |
| What type of cells are produced during Meiosis? | Unique |
| What are the 4 sources of variation during sexual reproduction? | Prophase, Metaphase, Anaphase, Telophase |
| What is Prophase? | Longest phase, chromatin condenses into chromosomes, centrioles separate and spindles form. |
| What is Metaphase? | Chromosomes line up across the center of the cell. |
| What is Anaphase? | Sister chromatids seperate into individual chromosomes. |
| What is Telophase? | Chromosomes gather at opposite ends of the cell and lose their shape. |
| How many chromosomes do humans have in somatic cells? What about sex cells? | 46, 23 |
| What does Diploid mean? | Two copies of each chromosome |
| What does Haploid mean? | One copy of each chromosome |
| When does crossing over occur during meiosis? | Prophase 1 and Metaphase 1 |
| What is the major focus of meiosis 1? | During Meiosis 1 produces 2 diploid cells. |
| What is the major focus of meiosis 2? | During Meiosis 2 produces 4 haploid cells. |
| What does it mean when a trait is dominant? | The trait is shown over the recessive. |
| What does it mean when a trait is recessive? | The trait is not shows or expressed. |
| What does it mean if a trait is co-dominant? | When both alleles are expressed equally. |
| What does it mean if a trait is Incomplete dominance? | Two different alleles form a gene that doesn't follow dominance. |
| What are polygenic traits? | Traits that are Shape,Height, and Weight |
| What are the sex chromosomes in males? What about Females? | XY,XX |
| What are the black pentagons stand for on the strand of DNA? | Deoxyribose |
| What weak bonds hold the complementary bases together? | Phosphates |
| What is a codon? | The code for an amino acid by using three nitrogen bases on mRNA. |
| What kind of bond holds the amino acids together in proteins? | Peptide Bonds |
| What are three types of RNA? | Messenger, Transfer, Ribosomal |
| What is Messenger RNA? | A single stranded copy of a gene that codes for a protein |
| What is Transfer RNA? | Transports amino acids to the ribosome. |
| What is Ribosomal RNA? | Ribosomes and Proteins are made. |
| What is transcription? | Transfer of information from DNA to RNA. |
| What is translation? | Process of changing the genetic code into proteins. |
| What happens to DNA when a mutation occurs? | It changes the nucleotide sequence of DNA. |
| What is a vestigial structure? | Structures with no or little function in organisims |
| What are adaptations? | Ability of a population to change, provides improved functions. |
| What does it mean to be "fit" in an environment? | Be able to survive in your enviroment |