Bio homework - in a similar cross Predictiong Results Of...

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Biology Honors Notes 9-2 ; Wandy Pascoal Genotype and Phenotype Genotype is the genetic makeup of an organism, it consists of alleles that the organism inherits from its parents The appearance of an organism, as a result of genotype, is phenotype. Human phenotypes can be altered by behavior When both alleles of a pair are alike the organism is homozygous for that characteristic an organism may be homozygous dominant or homozygous recessive When two alleles in the pair are different the organism is called heterozygous Probability likelihood that a specific event will occur. It may be expressed as a decimal, percentage or a fraction FOR EXAMPLE: in Mendel's experiment the dominant trait of yellow seed color appeared in the F2 generation 6022 times. Total number of individuals was 8023 (6022+2001) 6022/8023=0.75 = 75% The probability that the dominant trait will appear
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Unformatted text preview: in a similar cross Predictiong Results Of Monohybrid Crosses • A cross between individuals that involves one pair of contrasting traits is a monohybrid cross • a cross b/w a pea plant that is pure for producing purple flowers and one that is pure for producing white flowers is an example of a monogybrid cross • Scientists use a punnet square to predict some of these offspring • Example 1: Homozygous x Homozygous • PP x pp all Pp chance for everything • Example 2: Homozygous x Heterozygous • BB x Bb • Exacmple 3: Heterozygous x Heterozygous Biology Honors Notes 9-2 ; Wandy Pascoal • Example 4: Testcross • unknown genotype is crossed with a homozygous recessive individuals • Example 5: Icomplete Dominance • Example 6: Codominance Predicting Results of Dihybrid Crosses • homozygous x homozygous Biology Honors Notes 9-2 ; Wandy Pascoal...
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This note was uploaded on 03/03/2011 for the course BIOL 207 taught by Professor Lickey during the Spring '08 term at Bridgewater College.

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Bio homework - in a similar cross Predictiong Results Of...

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