The three genes (lacZ, lacY, and lacA) are transcribed as a single mRNA from the promoter, these genes are expressed at high levels only when

#Question id: 2457

#Unit 2. Cellular Organization

The two proteins that play the most important role in actin microfilament elongation are:

#Question id: 26406

#Unit 3. Fundamental Processes

#Question id: 4780

#Unit 8. Inheritance Biology

In chickens, comb shape is determined by alleles at two loci (R, r and P, p). A walnut comb is produced when at least one dominant allele R is present at one locus and at least one dominant allele P is present at a second locus (genotype R_ P_). A rose comb is produced when at least one dominant allele is present at the first locus and two recessive alleles are present at the second locus (genotype R_pp). A pea comb is produced when two recessive alleles are present at the first locus and at least one dominant allele is present at the second (genotype rrP_). If two recessive alleles are present at the first and at the second locus (rrpp), a single comb is produced. Which of the following cross would produce ½ walnut and ½ pea comb ?

#Question id: 32384

#Unit 2. Cellular Organization

#Question id: 6983

#Unit 5. Developmental Biology

In vertebrates, the heart forms from: