2. Your friend knows that you took Human Biology and studied genetics. She asks

Question

2. Your friend knows that you took Human Biology and studied genetics. She asks you to explain a Punnett square to her. How do you explain how a Punnett square is read? Apply the following terms to your explanation: dominant, heterozygous & homozygous, recessive, one-trait & two-trait crosses, dihybrid cross and probability

Essay Format. The response must be thorough and complete. Must be in full sentences not just word answers, at least, a decent size paragraph long. the answers should express your understanding of the concepts. Answer all parts of all questions.

Explanation / Answer

The punnett square is a diagram used to predict the outcome of a cross.

A diploid organism is homozygous if it contains same alleles of a gene at a gene locus.

A diploid organism is heterozygous if it contains two different alleles of a gene at a gene locus.

In genetics, dominant trait is the trait that is manifested in the offsprings even a single dominant allele is present.

In case of recessive trait, two of such alleles are required to manifest the trait.

Dihybrid cross is a cross between two pure lines (varieties, strains) that differ in two observed traits.

A punnett square is drawn to predict whether the offsprings are homozygous or heterozygous for a particular trait based on the alleles. If two recessive allele are present in an offspring, then we can predict that the offspring will have a recessive triat.

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.