Bellringer : Complete the Punnett Square
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Transcript of Bellringer : Complete the Punnett Square
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Bellringer: Complete the Punnett SquareIn Roses having thorns is dominant to not having thorns. Use
the punnett square to predict the probability that the offspring produced between two heterozygous roses will have thorns.
T t
T
t
Genotype:25% Homozygous TT50% Heterozygous Tt25% Homozygous tt
Phenotype:75% Thorns25% No Thorns
TT Tt
Tt tt
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Bellringer: Complete the Punnett SquareR- Red flowersr- white flowers
R R
R
r
RR RR
Rr Rr
Genotype:50% Homozygous RR50% Heterozygous Rr
Phenotype:100% Red Flowers
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Asexual vs. Sexual Reproduction
-REVIEW: What is Heredity? The passing of traits from parents to the offspring.-MAKE CONNECTIONS:How is heredity related to reproduction?Parents create offspring through reproduction which enables them to pass their traits to the next generations.
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Sexual ReproductionSexual
Reproduction
1. 2 parents: Male and Female
2. Gametes are created through Meiosis: sperm (male)and egg(female)
3. Sperm and egg join= fertilization. After fertilization occurs the fertilized egg develops into the offspring.
4. Offspring look different from parent (mixed DNA)
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Sexual ReproductionMeiosis- process of cell division that creates reproductive cells (gametes)with ½ the number of chromosomes as the original parent cell.
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Sexual ReproductionAll the members of the
Animal KingdomFishMammalsAmphibiansBirdsReptilesInsectsCrustaceans
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Sexual ReproductionPlant Kingdom
Flowers are the reproductive organs of plants.
Some flowers have both male and female reproductive organs on the same flower.
Male flower
Female flower
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Asexual ReproductionAsexual
Reproduction
1. One parent2. No
gametes/reproductive cells are involved
3. Offspring produced by cell division (Mitosis)
4. Offspring identical to parent (same DNA)
5. Several different types of asexual reproduction.
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Asexual ReproductionOffspring have 100% the same chromosomes
as the parent.
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Asexual ReproductionBinary Fission
BacteriaProtists
Binary fission is a form of asexual reproduction where every organelle is copied and the organism divides in two.
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Plant Reproduction Plant cuttings
(Plantlets)
Small pieces of a plant are cut off and rooted, to produce a new identical plant.
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Plant Reproduction Tubers: an
underground stem that contains stored nutrients (starch).
Potatoes can be cut into pieces with each piece having an “eye” which can grow into a new potato plant.
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Plant ReproductionBulbs: Short
underground stems surrounded by thick fleshy leaves that contain stored food.
New bulbs sprout from the old one.
Each bulb can grow into a new plant
Ex. Onions, tulips, garlic.
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Plant ReproductionRunner : Stem
that grows sideways along the surface of the ground that has buds that can grow into new plants when they contact soil.
Ex. Strawberry plants
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Plant ReproductionRhizome: Stem that
grows sideways underground.
Enlarged portions called nodes grow into buds which can form new plants.
Ex. Irises, ginger.
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BuddingYeast
Hydra
Budding is a means of asexual reproduction where a new individual develops from an outgrowth of a parent, splits off, and lives independently.
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Regeneration-Starfish
Regeneration occurs when a body part has broken off and the organism grows a new one.
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RegenerationFragmentation
Fragmentation is a means of asexual reproduction where a single parent breaks into parts that regenerate into whole new individuals.
Leech
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Sporulation: Spore formationOccurs in fungus,
algae and moldTiny spores form
inside the parent cell and are released and can grow into an adult organism.
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Homework:Make a Venn Diagram
Asexual Reproduction
Sexual Reproduction
Both
Types of reproduction in living organisms
Pass DNA from
parent to offspring