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mountain lion
DNA,Chromosomes and proteins
| Question | Answer |
|---|---|
| chromosomes | copied strands of DNA (genetic material) |
| Genes | segments of DNA |
| DNA controls cell activities by directing protein synthesis | DNA- RNA -PROTIEN |
| what do proteins do | proteins determine TRAITS and cell function |
| What is Genetic variation | differences in DNA helps survival |
| More variation | better chance to survive environmental changes |
| Evolutionary relationships are best shown by | similar DNA sequences molecular evidence |
| Natural disasters | species survive if they have have variation |
| low diversity | higher extinction risk |
| Lack of diversity | higher extinction risk |
| sexual reproduction | increases variation |
| Asexual reproduction (mitosis) | least variation |
| Mitosis | growth/repiar (BODY CELLS) DIPLIOD (2N) identical cells exactly the same |
| Meiosis | Gamete formation (SEX CELLS) Haploid (n) Genetically unique variation |
| sperm cell | male |
| egg cell | female |
| Genotype | genetic code (letter combo) |
| phenotype | physical traits |
| Dominat alleles | captial letter |
| recessive alleles | lowercase letter |
| heterozygous | 2 diffrent alleles |
| homozygous | same alleles (two of the same) |
| what do gametes carry | half of the genetic infto |
| fertilization | union of gametes |
| Haploid cells | (N) |
| Haploid male gamete | 23 chromosomes |
| haploid female gamete | 23 chromosomes |
| crossing over | exchange of genetic material |
| sperm and egg | fertilization - zygote |
| zygote | first cell |
| what does zygote devople | into fetus by mitosis |
| all cells are now | diploids (2N) |
| Body cells carry | full genetic information |
| cells specializes through | mitosis |
| All body cells have the same | DNA ,diffrent functions |
| Identical twins | single egg fertilized by single sperm then splits into two |
| fraternal twins | separate eggs fertilized by separate sperm |
| prostate gland | gland that produces fuid that nourishes and protects sperm |
| vas deferens | tube that carries sperm from the testes to the uretha |
| testes | sperm cells are produced here through miosis |
| penis | organ that delivers sperm to the female and allows passage of the urine form the body |
| male hormone | testosterone |
| sex cell | sperm |
| fallopian tube/oviduct | transports the egg from the ovary fertilization occurs here |
| ovary | egg cells mature here and begin meiosis |
| endometrium | the lining go the uterus where the fertilized egg implants |
| cervix | part of the uterus that opens into the vagina |
| vagina/birth Canal | where the sperm enters and child brith occurs |
| uterus/womb | fetus devolves here |
| female hormones | estrogen and progesterone |
| placenta | the organ that connects the fetus to the uterus allows nutrient and waste exchange |
| umbilical cord | the cord that connects the fetus to the placenta carrying nutrients and oxygen |
Created by:
EllieDreyfus