Chernobyl Nuclear Power station explosion is an example of accidental exposure to mutagens.

A plant with purple flowers is allowed to self-pollinate. Generation after generation, it produces purple flowers. This is an example of hybridization.

Increasing environmental levels of mutagen is likely to lead to increasing frequency of deleterious alleles.

Colorblindness is a sex linked disease in which: XB –>X chromosome with normal dominant allele (not colorblind) Xb –> X chromosome with recessive colorblind allele Then, write the genotypes for the following phenotypes of red-green color blindness- a. normal male _____________ b. normal female carrying no colorblind alleles (Homozygous) _____________ c. colorblind male _____________ d. normal female carrying the colorblind allele (Heterozygous) _____________

______________ is random change in the sequence of DNA and ___________________ is a change in structure of chromosome.(chromosomal mutation / mutation)

Use the graph of y = f (x) to answer the questions. No work is necessary. a. Determine the y-intercept b. Find f (-4)

What are the hybridization and geometry of the central carbon atom in the following cumulene?

Mutations can occur at the gene level as well as at the chromosome level.

Mendel accounted for the observation that traits which had disappeared in the F1 generation reappeared in the F2 generation by proposing that  

BONUS Question: A homozygous tall pea plant with terminal flowers (flowers on the ends of the stems) is crossed with a homozygous short plant that has axial flowers. All 72 offspring are tall with axial flowers. This is a dihybrid cross with the height and flower position traits showing independent assortment. (6 points) Name the dominant and recessive alleles for both the traits (height and position of the flowers). Give the genotypes of the parents and offspring in this cross. Predict the F2 offspring when the tall-axial F1’s are allowed to self-pollinate.