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In Drosophila melanogaster, eyeless (ey) is a recessive trait in which the eyes are tiny or absent. The ey locus is found on chromosome 4. Monosomy and trisomy for this very small chromosome are compatible with survival and fertility. A trisomic wild-type male with the genotype ey+ ey+ ey is […]

Q1. Relate the functions of lactose, copper, and tyrosine to how these reagents affected phenotype or gene expression of the bacterial transformants. That is, examine how and why the same bacterial sample may look different on each of the various plates. Q2.Citrase is the enzyme that converts citrate a-ketoglutarate in […]

In humans, normal color vision vs. color blindness is determined by alleles C (normal) and c (color-blind) at X linked chromosomes a. Can a normal daughter have a color-blind father? A color blind mother? b. Can a normal son have a color blind father? A color-blind mother? c. Can two […]

In fruit flies, the gene for eye color is sex-linked (X-chromosome) and red eye color is dominant over white. The gene for body color is an autosomal trait with gray dominant over black. A heterozygous red-eyed, pure-bred gray female mates with a heterozygous gray male who has red eyes. What […]