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3 years ago

Which of the following statements is true regarding both theories and laws?

1 answer:

8 0

Theories may change over time. Unversal laws are supposed to not change.

Most theories and laws cannot not be definetly proved and they are constantly tested.

Consensus is not necessary. Many theories were discarded by the majority of scientific community before been accepted.

Both theories and laws must be based on scientific method and observations are a key part of it. Then, in my opinion, the true statement is that both are supported by observartios.

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2 years ago

) When predicting the phenotype of the offspring from a dihybrid cross, why is it so important that each gene is located in a di

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Answer:

a) The genes present on separate chromosomes exhibit indepedent assortment.

b) The genotype of tall and purple flower parent= TTPp

The genotype of short and purple flower parent: ttPp

Explanation:

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b) Alleles for tallness and purple flower are dominant. In the progeny, all the plants are tall. This means that the dominant tall plant is homozygous. With respect to flower color, the trait exhibits segregation of dominant and recessive alleles and both purple and white flower progeny are obtained. This makes both the plants heterozygous for the flower color gene.

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