In cats, black fur color is caused by an X-linked allele; the other allele at this locus causes orange color. The heterozygote is tortoiseshell. What kinds of offspring would you expect from the cross of a black female and an orange male?
A) tortoiseshell females; tortoiseshell males
B) black females; orange males
C) tortoiseshell females; black males
D) orange females; black males
C
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To increase the chance of detecting carcinogens in the Ames test, the test substance is treated with
A. penicillin. B. heat. C. ground-up rat liver. D. reverse transcriptase. E. penicillin AND heat.
The kidneys are protected by ____ tissue
a. adipose b. loose irregular connective c. dense regular connective d. stratified cuboidal epithelium e. simple squamous epithelium
Why have gene families evolved? Choose the most accurate answer for gene families in general
A) Although in some cases researchers have inferred that gene families are adaptive, gene families may also evolve due to genetic drift. B) Having multiple copies of a gene can increase transcription and translation of the gene, so when increased transcription is adaptive, then natural selection favors genes duplicating into gene families. C) Gene families are adaptive because each gene can produce a slightly different protein, which allows for diverse functions that are favored by natural selection. D) Gene families evolve because of the activity of mobile genetic elements, which cause repeated gene duplication events.
Gammaproteobacteria of the genus (Escherichia/Pseudomonas/Vibrio) catabolize carbohydrates using pathways other than the standard glycolytic (Embden-Meyerhof) pathway
What will be an ideal response?