Genetics Answers

Identify the different types of chromosomal abnormalities that can lead to disease (e.g. insertions) and in a sentence or two, describe a disorder associated with one of these aberrations.

What role do you suspect melanin plays based on this information?

In fruit flies, the gene for white eyes is a SEX-LINKED RECESSIVE TRAIT.

(R) is red and (r) is white.

Cross a white-eyed female with a normal red-eyed male. (remember it is sex-linked so attach to X)

What percent of the offspring will have RED EYES?

In snapdragons, red flower color W is not completely dominant over white w. The heterozygous condition produces pink flowers. What will be the rest of a cross between two pink-flowered snapdragons? Between a pink and a white one?

Identify the different types of chromosomal abnormalities that can lead to disease (e.g. insertions) and in a sentence or two, describe a disorder associated with one of these aberrations.

Explain what is meant by the term ‘linked genes’ with respect to homologous recombination.

Discussed the concept of inheritance in regards to genetic traits. How does the Chromosomal Theory of Inheritance helped to advance our understanding of genetics?

In humans, diabetes is a sex-linked recessive trait. If a homozygous normal woman and a man, whose mother is a diabetic, have children, what will be the phenotypes and genotypes of their children?

How does DNA create parts of an organism?

In humans the ability to roll your tongue is a dominant trait. If Jean Poole, who is heterozygous and can roll her tongue, and Reece Granger, who can roll his tongue but is homozygous have a child, what will be the genotypic and phenotypic ratios for their offspring possibilities?