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In a cross in Drosophila, a female heterozygous for the autosomally linked genes a, b, c, d, and e (abcde/+++++) was testcrossed with a male homozygous for all recessive alleles. Even though the distance between each of the loci was at least 3 map units, only four phenotypes were recovered, […]

QUESTION 1In humans, a gene that has been identified as causing a type of skin cancer is theA. sonic hedgehog.B. superwoman echidna.C. mutant mole rat.D. mutant superman.E. superhero aardvark. QUESTION 2An allele isA. the main factor determining a trait.B. always one of a pair.C. always recessive.D. an alternate form of […]

Please note the focus of the essay is to study material related to the emergence of the virus and methods of control. very brief introduction to the virus discuss modes of transmission and what the known vectors for transmitting Chikungunya virus are (please discus the modes not just writ mosquito […]

In cattle, roan coat color (mixed red and white hairs) occurs in the heterozygous (Rr) offspring of red (RR) and white (rr) homozygotes. Which of the following crosses would produce offspring in the ratio of 1 red : 2 roan : 1 white? A. red × white B. roan × […]