2) From a mating between two normal winged drosophila, 27 "dumpy-winged" and 79 normal winged offspring were produced. a) what is the nature of the dumpy wing allele? b) What were the genotypes of the parents?
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- 12) An individual with genotype AaBbCCDdEE can make many kinds of gametes. Which of the following correctly describes why this situation is possible? A) recurrent mutations form new alleles B) crossing over during prophase I leads to genetic variety C) different possible assortment of chromosomes/alleles into gametes occurs D) there is a tendency for dominant alleles to segregate together 13) Let P = purple20) When Thomas Hunt Morgan crossed his red-eved F1 generation flies to each other, the F2 generation included both red- and white-eyed flies. Remarkably, all the white-eyed flies were male. What was the explanation for this result? A) The gene involved is located on the Y chromosome. B) The gene involved is located on the X chromosome. C) The D) Other male-specific factors influence eye color in flies. gene involved is located on an autosome, but only in males.Consider a Droscophilia fly with a genotype of Nn XqYY. The dominant allele of the sex-linked gene specifies a black body and the recessive a white body. The recessive autosomal allele specifies hairy bristles while the dominant allele specifies smooth bristles. i)What is the ploidy of this fly? ii) What would the sex of this fly be? iii)What would the phenotype of this fly be with respect to these two loci?
- A man and his wife are both heterozygous for brown eyes. They have ix children all of whom have blue eyes? A) How is it explained? B) What are the chances that their next child will have brown eyes? C) What are the chances that their next child will have blue eyes.Using Drosophila notation: A.) Diagram the genotype of a female fly that is recessive for apterus (ap, chromosome 2), heterozygous wild-type for black (b, chromosome 2), recessive for forked (f, x-chromosome), and homozygous wild type for rosy (ry, chromosome 3). B.) Diagram the genotype of a male fly that is heterozygous for clot (ct) eyes (an autosomal gene) and has yellow (y) body color (x-linked gene).12. A heterozygous black mouse is crossed with a white mouse. a) Which color is dominant? b) How did you know? c) Which letter will stand for the dominant color? d) Which letter will stand for the recessive color? e) What is the genotype of the white mouse? f) What is the genotype of the heterozygous black mouse? g) Complete the Punnett Square below for this cross. h) What percent of the offspring will be black?
- You cross a true-breeding yellow-bodied, smooth-winged female fly with a true-breeding red-bodied, crinkle-winged male. The red body phenotype is dominant to the yellow body phenotype and smooth wings are dominant to crinkled wings. Use B or b for body color alleles, and W or w for wing surface alleles.(4 points) a) What are the genotypes of the P generation flies? b) What will be the genotype(s) and phenotype(s) of the F1 offspring? c) You discover that the genes for body color and wing surface are linked. You perform a dihybrid test cross between the F1 flies from part (b) with a true-breeding yellow-bodied, crinkle-winged fly. Use the following results of this cross to determine the recombination frequency (%) between the body color and wing surface genes. (Remember that the recombinants are the ones that do not resemble the parental types from the P generation.) Body Color Wing Surface # of Individuals red smooth 102 yellow smooth 404 red crinkled 396 yellow crinkled…In fruit flies red (A) eyes are dominant to apricot (a) eyes, and normal (P) wings and dominant to pointed (p) wings. Based on the information above, what are the possible gametes that could be produced by a fly that is homozygous for red eyes and heterozygous for normal wings? Group of answer choices: A) AA, Pp B) AP, Ap, aP, ap C) AP, Ap D) AAPpUsing the pedigree chart, explain: a) The number of generations seen. b) If all blue-coloured shapes are affected with disease X- how many males are affected? how many females are affected? c) Does this disease have a dominant or recessive inheritance pattern? Justify your answer.
- Given the karyotype shown at right, is this a male or a female? Normal or abnormal? What would the phenotype of this individual be?Females heterozygous for the recessive second chromosome mutations px, sp, and cn are mated to a male homozygous for all three mutations. The offspring are as follows: Must show all work 1.) What gene is in the middle? and what are the map distances between the genes in centimorgans? 2.) What is the interference?Bees have a haplodiploid sex determination. The recessive allele ivory causes bees to have white eyes. A white-eyed female is mated to a wild-type male. An F1 female is mated to a white-eyed male and some of her eggs are fertilized. She lays eggs after the mating. What are possible phenotypes of the offspring? i) wildtype males ii) wildtype females iii) white-eyed males iv) white-eyed females Group of answer choices A. only i and iii are possible oucomes B. only i and ii are possible oucomes C. all four (i, ii, iii, and iv) are possible phenotypes D. only ii and iii are possible oucomes E. only i,ii, and iii are possible oucomes