Life Science Unit Review

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Life Science Unit ReviewAsexual or Sexual ReproductionQ: Limits the spread of harmful traits

A: Asexual reproduction because each offspring is genetically identical to the parentSome Pea Plant Alleles:Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seedsCross a heterozygous purple plant (Pp) vs a homozygous dominant purple plant (PP). What are the genotypes and phenotypes of the offspring?

PP Pp PP PpPpPPGenotypes: PP, Pp Phenotypes: All PurpleAsexual or Sexual ReproductionQ: Requires only one parent

A: Asexual reproductionAsexual or Sexual ReproductionQ: Works best in stable environments that experience little change

A: Asexual reproductionAsexual or Sexual ReproductionQ: Offspring can sometimes show a genetic trait (including disease) that the parents did not have

A: Sexual reproductionSome Pea Plant Alleles:Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seedsCross a heterozygous tall plant (Tt) vs a heterozygous tall plant (Tt). What are the genotypes and phenotypes of the offspring?

TT Tt Tt ttTtTtGenotypes: TT, Tt, tt Phenotypes: First two are tall, last one is shortSome Pea Plant Alleles:Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seedsTallness in plants: what is the genotype for a homozygous dominantTTMitosis or MeiosisCreates an exact copy of the original cellMitosisAsexual or Sexual ReproductionQ: Each offspring is genetically identical to the parent so if the organism is well adapted to the environment the offspring will be exactly the same

A: Asexual reproductionSome Pea Plant Alleles:Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seedsFlower color what is the phenotype for PpPurple flowersAsexual or Sexual ReproductionQ: Usually allows for quicker adaptation to changes in the environment

A: Sexual reproductionMitosis or MeiosisStarts with one cell with a full set of chromosomes, result is four cells each with a half set of chromosomesMeiosisSome Pea Plant Alleles:Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seedsFor seed shape-what is the genotype for homozygous dominant plantRRSome Pea Plant Alleles:Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seedsTallness in plants: what is the genotype for a heterozygous plantTtMitosis or MeiosisStarts with one cell with a full set of chromosomes, result is two cells each with a full set of chromosomesMitosisSome Pea Plant Alleles:Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seedsCross a heterozygous purple flower plant vs. a white flowered plant. What are the genotypes and phenotypes of the offspring?

Pp pp Pp ppPpppGenotypes: Pp, pp Phenotypes: Purple, WhiteSome Pea Plant Alleles:Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seedsFlower color- genotype for a heterozygous plantPp

Some Pea Plant Alleles:Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seedsPlant height- genotype for a short planttt

Asexual or Sexual ReproductionQ: Produces genetic variation

A: Sexual reproductionMitosis or MeiosisSplits the number of chromosomes in a cell in halfMeiosisSome Pea Plant Alleles:Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seedsFlower color what is the phenotype for ppwhite flowersAsexual or Sexual ReproductionQ: Usually produces large numbers of offspring quickly

A: Asexual reproductionSome Pea Plant Alleles:Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seedsCross a heterozygous plant vs a homozygous dominant tall plant. What are the genotypes and phenotypes of the offspring?

TT TT Tt TtTTTtGenotypes: TT, Tt Phenotypes: all tallSome Pea Plant Alleles:Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seedsFor seed shape-what two genotypes would result in round seedsRR, RrSome Pea Plant Alleles:Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seedsCross a heterozygous round plant vs a heterozygous round plant. What are the genotypes and phenotypes of the offspring?

RR Rr Rr rrRrRrGenotypes: RR, Rr, rr Phenotypes: First two are Round, last one is wrinkled