You are working with two unlinked in The Drosophila melanogaster. first controls body type and has two alleles. Dominant E produces normal body color while recessive e produces ebony body color. The second controls eye color and also has two alleles. Red eyes arise from the dominant allele R, while sepia eyes arise from the recessive allele r. You testcross a female fly with red eyes and normal body color and observe the following offspring counts. What is the female’s genotype? Red and normal Red and ebony Sepia and normal and ebony 93 0 105 0 EE RR EE Rr Ee RR None of the above Ee Rr In a breed of flowering plant, the number of flower petals is controlled by one gene locus. Allele F produces 6 petals while allele f produces 4 petals. If the phenotype of this trait is governed by paternal imprinting, what will be the genotype and phenotype of the offspring of the following cross, female listed first? ff x FF Ff; 4 petals ff; 6 petals Ff; 6 petals None of these ff; 4 petals Birds have ZW-ZZ sexual differentiation. Which is the heterogametic sex in birds? Males, because they have genotype ZW Males, because they have genotype ZZ Females, because they have genotype ZW Females, because they have genotype ZZ None of the above Why does X-inactivation occur? So females don’t overexpress certain genes. So males can develop male secondary sexual characteristics. So faulty X chromosomes can be silenced. So haploid male insects don’t develop female sexual characteristics. None of the above.
You are working with two unlinked in Drosophila melanogaster. The first controls body type and has two alleles. Dominant E produces normal body color while recessive e produces ebony body color. The second controls eye color and also has two alleles. Red eyes arise from the dominant allele R, while sepia eyes arise from the recessive allele r. You testcross a female fly with red eyes and normal body color and observe the following offspring counts. What is the female’s genotype? Red and normal Red and ebony Sepia and normal and ebony 93 0 105 0 EE RR Ee RR Ee Rr EE Rr None of the above In a breed of flowering plant, the number of flower petals is controlled by one gene locus. Allele F produces 6 petals while allele f produces 4 petals. If the phenotype of this trait is governed by paternal imprinting, what will be the genotype and phenotype of the offspring of the following cross, female listed first? ff x FF Ff; 4 petals Ff; 6 petals ff; 4 petals ff; 6 petals None of these Birds have ZW-ZZ sexual differentiation. Which is the heterogametic sex in birds? Males, because they have genotype ZW Males, because they have genotype ZZ Females, because they have genotype ZW Females, because they have genotype ZZ None of the above Why does X-inactivation occur? So females don’t overexpress certain genes. So males can develop male secondary sexual characteristics. So faulty X chromosomes can be silenced. So haploid male insects don’t develop female sexual characteristics. None of the above.
BIOL_GEN_313_Vollbrecht_mdcook_SI_BIOL_313_-_Exam_6_Review.docx