A single-celled organism would be expected to undergo cell differentiation. If False, change it.
a. true
b. false
Ans: b. false
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In the mouse, gene A allows pigmentation to be deposited in the individual coat hairs; its allele a prevents such deposition of pigment, resulting in an albino. Gene B gives agouti (wild-type fur); its allele b gives black fur
(a) Diagram the cross between a doubly heterozygous agouti mouse mated with a doubly homozygous recessive white mouse. (b) What would be the expected phenotypic ratio in the progeny?
Of the 23 pairs of human chromosomes, 22 pairs are homologous and are found in both males and females. These are called ________.
A. recombinant chromosomes B. somatic chromosomes C. autosomes D. bivalents
Proteins that are composed of more than one polypeptide chain are said to have ________ structure
A) tertiary B) primary C) quaternary D) secondary
Strep infections caused by strains of Streptococcus bacteria are responsible for ________ .
a. heart failure b. scarlet fever c. myocardial infarction d. endocarditis e. rheumatic fever