Life Science Unit Review Asexual or Sexual Reproduction

Life Science Unit Review

Asexual or Sexual Reproduction �Q: Limits the spread of harmful traits �A: Asexual reproduction because each offspring is genetically identical to the parent

Some Pea Plant Alleles: Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seeds �Cross a heterozygous purple plant (Pp) vs a homozygous dominant purple plant (PP). �What are the genotypes and phenotypes of the offspring? P p P PP Pp Genotypes: PP, Pp Phenotypes: All Purple

Asexual or Sexual Reproduction �Q: Requires only one parent �A: Asexual reproduction

Asexual or Sexual Reproduction �Q: Works best in stable environments that experience little change �A: Asexual reproduction

Asexual or Sexual Reproduction �Q: Offspring can sometimes show a genetic trait (including disease) that the parents did not have �A: Sexual reproduction

Some Pea Plant Alleles: Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seeds �Cross a heterozygous tall plant (Tt) vs a heterozygous tall plant (Tt). �What are the genotypes and phenotypes of the offspring? T t T TT Tt tt Genotypes: TT, Tt, tt short Phenotypes: First two are tall, last one is

Some Pea Plant Alleles: Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seeds �Tallness in plants: what is the genotype for a homozygous dominant �TT

Mitosis or Meiosis �Creates an exact copy of the original cell �Mitosis

Asexual or Sexual Reproduction �Q: 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 reproduction

Some Pea Plant Alleles: Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seeds �Flower color what is the phenotype for Pp �Purple flowers

Asexual or Sexual Reproduction �Q: Usually allows for quicker adaptation to changes in the environment �A: Sexual reproduction

Mitosis or Meiosis �Starts with one cell with a full set of chromosomes, result is four cells each with a half set of chromosomes �Meiosis

Some Pea Plant Alleles: Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seeds �For seed shape-what is the genotype for homozygous dominant plant �RR

Some Pea Plant Alleles: Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seeds �Tallness in plants: what is the genotype for a heterozygous plant �Tt

Mitosis or Meiosis �Starts with one cell with a full set of chromosomes, result is two cells each with a full set of chromosomes �Mitosis

Some Pea Plant Alleles: Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seeds �Cross a heterozygous purple flower plant vs. a white flowered plant. What are the genotypes and phenotypes of the offspring? P p p Pp pp Genotypes: Pp, pp Phenotypes: Purple, White

Some Pea Plant Alleles: Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seeds �Flower color- genotype for a heterozygous plant �Pp

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

Asexual or Sexual Reproduction �Q: Produces genetic variation �A: Sexual reproduction

Mitosis or Meiosis �Splits the number of chromosomes in a cell in half �Meiosis

Some Pea Plant Alleles: Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seeds �Flower color what is the phenotype for pp �white flowers

Asexual or Sexual Reproduction �Q: Usually produces large numbers of offspring quickly �A: Asexual reproduction

Some Pea Plant Alleles: Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seeds �Cross a heterozygous plant vs a homozygous dominant tall plant. What are the genotypes and phenotypes of the offspring? T TT TT t Tt Tt Genotypes: TT, Tt Phenotypes: all tall

Some Pea Plant Alleles: Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seeds �For seed shape-what two genotypes would result in round seeds �RR, Rr

Some Pea Plant Alleles: Pea plants T-tall plants t-short plants P-purple flowers p-white flowers R-round seeds r-wrinkled seeds �Cross a heterozygous round plant vs a heterozygous round plant. What are the genotypes and phenotypes of the offspring? R r R RR Rr rr Genotypes: RR, Rr, rr wrinkled Phenotypes: First two are Round, last one is