In drosophila, an autosomal gene determines the shape of the hair, with b giving straight and b giving bent hairs. on another autosome, there is a gene of which a dominant allele i inhibits hair formation so that the fly is hairless (i has no known phenotypic effect). a. if a straight-haired fly from a pure line is crossed with a fly from a pure-breeding hairless line known to be an inhibited bent genotype, what will the genotypes and phenotypes of the
f1
and the
f2
be? b. what cross would give the ratio 4 hairless : 3 straight : 1 bent?

Abody cell has been growing and at synthesis proteins. in the nucleus of this body cell, dna replication is taking place. and a copy of the cells genetic material is copied. which of the following is the best conclusion you can make about the life cycle of this cell ? a) the cell is ready to undergo mitosis. and a chemical signal will send the cell to prophase b)the cell is undergoing meiosis and will cross over the genetic material next c)the cell is in the s phase of interphase and will move next to the g2 phase d) the cell is in the g2 phase of the interphase and is ready to begin diving