Dihybrid Punnett Squares

Nov 28, 2013

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Dihybrid Punnett Squares. Steps. 1. Identify the parents genotypes. Ex. heterozygous tall, homozygous red flowers. TtRR 2. Use FOIL to get gamete (sex cell) possiblities. Ex. TR or tR 3. Short cut…how many boxes for the punnett square depends on how many possible gametes…. Example.

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Dihybrid Punnett Squares

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Dihybrid Punnett Squares
Steps • 1. Identify the parents genotypes. Ex. heterozygous tall, homozygous red flowers. TtRR 2. Use FOIL to get gamete (sex cell) possiblities. Ex. TR or tR 3. Short cut…how many boxes for the punnett square depends on how many possible gametes….
Example • TtRR x TtRr • P1: TR, tR • P2: TR, Tr, tR, tr TR Tr tR tr TR tR
Phenotypic ratios • How many??? Tall and Red: Tall and White: Short and Red: Short and White:

Punnett Squares

Probability & Genetics . Punnett Squares. Punnett Squares . To help explain how alleles were separated into gametes and rejoined, Reginald Punnett developed a visual tool to depict test crosses and show the offspring’s possible genotypes and phenotypes A Punnett square looks like .

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DIHYBRID PUNNETT SQUARES

DIHYBRID PUNNETT SQUARES. A tall plant is crossed with a short plant. What is the probability that the offspring will be short?. T=tall t=short. A cross that accounts for only one trait (e.g. height OR eye color OR shape). MONOHYBRID CROSS. Cross that accounts for two traits

325 views • 15 slides

Punnett Squares

Punnett Squares. Tt. Homozygous = purebred. Heterozygous = hybrid. TT or tt. Homozygous vs heterozygous. We use a Punnett square to :. Find the probability of the offspring Predict. Punnett Square Steps. 1 - identify traits that are dominant & recessive T = tall t = short

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Punnett Squares

Punnett Squares. The Father of Genetics. Gregor Mendel performed the first major experiments investigating heredity. Austrian Monk Was college trained in Science and Math Experimented between 1856-1863 Investigated heredity in pea plants at his monastery. Mendel’s Experiments.

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Punnett Squares

Punnett Squares. Dominant. Dominant alleles are always represented with a uppercase letter. A B C D E F G H I. Recessive. Recessive alleles are always represented by a lowercase letter. a b c d e f g h i. Homozygous.

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Punnett Squares

Punnett Squares. C Kohn, Waterford WI. Genetics. Genetics is the study of inheritance of genes. i.e. genetics is how traits are passed down from parents to offspring Every individual offspring inherits at least two copies of every gene – one from the mother and one from the father.

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Punnett Squares

Punnett Squares. BELL RINGER. What do these pictures show? What is unusual about this hand and foot? Look closely!!. BELL RINGER CONT. The hand and foot have six fingers and toes instead of five.

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Revisiting Dihybrid Punnett Squares

Revisiting Dihybrid Punnett Squares. What exactly is a dihybrid cross? Predicting the outcomes from crossing 2 traits. Why do we use them? Instead of doing to monohybrid crosses, you can combine them to see all the possible combinations from that particular mother and father.

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Punnett squares

Punnett squares. The tool which uses the combination of genes to predict the traits showing up in offspring. Green eyes are dominant and yellow eyes are recessive. The genotype of two insects are Gg and Gg. Complete a Punnett square!. g. G. GG. G. Gg. ??. g. Gg. ?? = gg.

615 views • 38 slides

Dihybrid Punnett Squares

Dihybrid Punnett Squares. What exactly is a dihybrid cross? Predicting the outcomes from crossing 2 traits. Why do we use them? Instead of doing to monohybrid crosses, you can combine them to see all the possible combinations from that particular mother and father. Dihybrid Cross.

627 views • 18 slides

Dihybrid Punnett Squares

Dihybrid Punnett Squares. You are a product of your family and your environment. Review: Monohybrid Cros. Autosomal Dominant/Recessive inheritance Predicting one trait at a time Mono=one. Dihybrid Worksheet. Autosomal Dominant/Recessive Inheritance Dealing with two traits at a time

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Punnett Squares

Punnett Squares. Genotype/ Phenotype. Punnett Squares. Genetics and Probability Note: Probability: is the possibility, or likelihood something will occur Point: It can be used to predict the results of genetic crosses. Punnett Squares. Probability Points:

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Punnett Squares

Punnett Squares. T=Tall t=short. Example of Phenotype? Example of Genotype?. T=Tall t=short. Example of Phenotype: Tall Example of Genotype: Tt (Heterozygous). T = Tall t= short. Genotype: 50% Heterozygous 50% Homozygous Recessive

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Due: Two Trait Punnett Squares (Dihybrid) Do: Correct Two Trait Punnett Squares (Dihybrid)

Starting Point 1.12.11 Wednesday Late = Up to 1 week @ 50%. After = 0% Absent = 1 Week @ 100% credit. Both must be 100% Complete/Corrected by you. Due: Two Trait Punnett Squares (Dihybrid) Do: Correct Two Trait Punnett Squares (Dihybrid) Notes Ch.11 Different Kinds of Dominance

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Punnett Squares

Punnett Squares. Mr. Mah Ms. Redelmeier Living Environment. HOMOZYGOUS organism with two identical alleles for the same trait (TT or tt). HETEROZYGOUS organism with two different alleles for the same trait (Tt).

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Punnett Squares

Punnett Squares. OGT. What are Punnett squares ?. They are tables that allow us to predict the traits of offspring They are a visual, hypothetical cross between parents Punnett squares are named for an English geneticist, Reginald Punnett. What is a trait?.

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Punnett Squares

Punnett Squares. Punnett Squares. A Punnett square illustrates how the parents’ alleles might combine in offspring. The top of the Punnett Square are one of the parent’s alleles, the side of the Punnett square shows the other parent’s alleles for the trait.

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Punnett Squares

Punnett Squares. Kelly Coleman High School Biology. Objective:. After this lesson you will be able to predict the outcome of genetic crosses using a Punnett Square. How are traits inherited?. We know offspring look like parents

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Dihybrid Punnett Squares

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Punnett Squares

Punnett Squares. How can I predict the appearance of offspring based on the traits of the parents?. Two kinds of inheritance:. Mendelian inheritance includes any trait which has only a pair of contrasting alleles and one of the alleles is dominant to the other allele.

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