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Punnet squares experiment - Lab Report Example

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To know how the genes are tranmitted from parents to the off springs and how this helps in the determination of the genotypes and the phenotypes, the mendelian genetics helps us. (Hartl and Jones…
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Punnet squares experiment lab
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Punnet squares experiment

Download file to see previous pages... The phenotype is the way of the expression of the combination of the genes. When the two alleles for a particular characteristic are identical, it is called as homozygous allele and if different it is called as heterozygous allele. If two different alleles are present in a trait, then only characteristics is expressed. It is called as Dominant allele and the other is called as the recessive allele.
In the scenario 1, the heterozygous gray-bodied fly and the homozygous black-bodied fly are crossed and the first felial generation was obtained. The Punnet square for this crossing is given below. The F1 generation contains 2 heterozygous gray-bodied fly and 2 homozygous black-bodied fly as the offsprings.
In the scenario 2, two heterozygous gray bodied flies are crossed and the first felial generation was obtained. It was found that the F1 generation contains 2 heterozygous gray bodied flies 1 homozygous gray bodies fly and 1 homozygous black-bodied fly as the offsprings. The Punnett Square for this crossing is given below
In the scenario 3, homozygous long-winged fly and the homozygous vestigial – winged fly are crossed and the first felial generation was obtained. The F1 generation was found to have 4 heterozygous long-winged flies. The punnett square for this crossing is given below.
The fourth scenario is based on the mating of homozygous long-winged fly with the heterozygous long-winged fly. The F1 generation obtained was found to contain 2 homozygous long-winged fly and 2 heterozygous long-winged fly. The punnett square is given below.
In the scenario 5, the mating of the heterozygous long-winged flies was carried out and the first felial generation obtained was found to contain 1 homozygous long winged fly, 2 heterozygous long-winged flies and 1 homozygous vestigial-winged fly. The punnett square for this mating is given below.
The 6th Scenario is based on the mating of the homozygous gray bodied fly with the ...Download file to see next pagesRead More
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