When homozygous yellow mutant rats [J] are crossed with homozygous black mutant rats [N], all F1 is grey [G]. In F2, we obtain 10 [J], 28 [G], 8 [N] and 2 light individuals. Tick the plausible explanation(s): O O O O O O the allele responsible for the grey colour is dominant over the alleles responsible for the black and yellow colour no genetic interaction here, the 2 genes act independently no genetic interaction here, it is a monohybridism with one allelic series no correct answer the allele responsible for the yellow colour is epistatic on the gene responsible for the black colour the allele responsible for the black colour is epistatic on the gene responsible for the grey colour

When homozygous yellow mutant rats [J] are crossed with homozygous black mutant rats [N], all F1 is grey [G]. In F2, we obtain 10 [J], 28 [G], 8 [N] and 2 light individuals. Tick the plausible explanation(s): O O O O O O the allele responsible for the grey colour is dominant over the alleles responsible for the black and yellow colour no genetic interaction here, the 2 genes act independently no genetic interaction here, it is a monohybridism with one allelic series no correct answer the allele responsible for the yellow colour is epistatic on the gene responsible for the black colour the allele responsible for the black colour is epistatic on the gene responsible for the grey colour

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter3: Transmission Of Genes From Generation To Generation

Section: Chapter Questions

Problem 18QP: More Crosses with Pea Plants: The Principle of Independent Assortment Determine the possible...

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A wild-type fruit fly (heterozygous for gray body color andred eyes) is mated with a black fruit fly with purple eyes. Theoffspring are wild-type, 721; black purple, 751; gray purple, 49;black red, 45. What is the recombination frequency betweenthese genes for body color and eye color? Using informationfrom problem 3, what fruit flies (genotypes and phenotypes)would you mate to determine the order of the body color, wingsize, and eye color genes on the chromosome?
In Morgan’s three-factor crosses of Figure shown, he realized thatcrossing over was more frequent between the eye color and winglength genes than between the body color and eye color genes.Explain how he determined this.
In jabuticaba tree plant, Plinia cauliflora, the AA, Aa plants round fruit and aa oval fruit, the CC, Cc individuals show dark purple fruit and cc individuals are yellow; for the B locus B1B1 plants have all the fruit in their bark, B2B2 plants have fruit in the branches only and B1B2 plants have fruit in their bark and branches. A trihybrid jabuticaba having the genotype AaB1B2Cc is self-fertilized. Is there complete dominance at the B loci, yes or no? Please explain.
More Crosses with Pea Plants: The Principle of Independent Assortment Determine the possible genotypes of the following parents by analyzing the phenotypes of their children. In this case, we will assume that brown eyes (B) is dominant to blue (b) and that right-handedness (R) is dominant to left-handedness (r). a. Parents: brown eyes, right-handed brown eyes, right-handed Offspring: 3/4 brown eyes, right-handed 1/4 blue eyes, right-handed b. Parents: brown eyes, right-handed blue eyes, right-handed Offspring: 6/16 blue eyes, right-handed 2/16 blue eyes, left-handed 6/16 brown eyes, right-handed 2/16 brown eyes, left-handed c. Parents: brown eyes, right-handed blue eyes, left-handed Offspring: 1/4 brown eyes, right-handed 1/4 brown eyes, left-handed 1/4 blue eyes, right-handed 1/4 blue eyes, left-handed
Figure 8.10 In pea plants, purple flowers (P) are dominant to white (p), and yellow peas (Y) are dominant to green (y). What are the possible genotypes and phenotypes for a cross between PpYY and ppYy pea plants? How many squares would you need to complete a Punnett square analysis of this cross?
The ABO blood groups in humans are expressed as the IA,IB and i alleles. The IAallele encodes the A blood group antigen, IB encodes B, and i encodes O. Both A and B are dominant to 0. If a heterozygous blood type A parent (IAi) and a heterozygous blood type B parent (IBi) mate, one quarter of their offspring are expected to have the AB blood type IAIBin which both arnigens are expressed equally. Therefore, ABO blood groups are an example of: a. multiple alleles and incomplete dominance b. codominance and incomplete dominance c. incomplete dominance only d. multiple alleles and codominance
In cats, the genotype AA produces tabby fur color; Aa is also a tabby, and aa is black. Another gene at a different locus is epistatic to the gene for fur color. When present in its dominant W form (WW or Ww), this gene blocks the formation of fur color and all the offspring are white; ww individuals develop normal fur color. What fur colors, and in what proportions, would you expect from the cross AaWw Aa Ww?
In sweet pea plant, an allele for purple flowers (P) is dominant when paired with a recessive allele for red flowers (p). An allele for long pollen grains (L) is dominant when paired with a recessive allele for round pollen grain (l). Bateson and Punnett crossed a plant having purple flowers/long pollen grains with one having white/flowers/round pollen grains. All F1 offspring had purple flowers and long pollen grains. Among the F2 generation, the researchers observed the following phenotypes: 296 purple flowers/long pollen grains 19 purple flowers/round pollen grains 27 red flowers/long pollen grains 85 red flowers/round pollen grains What is the best explanation for these results?
6 5 0/1 point Let's continue with these two genes that control the color and texture of tomatoes. Allele "R" generates a red coloration, and is dominant. Allele "r" generates a green col Allele "S" generates a smooth texture, and is dominant. Allele "s" generates a rough te You now decide to cross your dihybrid RrSs but this one with a tomato with Rrss. RrSs x Rrss What is the probability of getting Red tomatoes with Rough texture in this new cro Assume complete dominance and 100% penetrance and expressivity. O 1/8 3/16 O9/16 3/8 O 1/16 X x 1/4 1/2 1/1 point Later on, you made a completely new cross. But you cannot remember the ge You are sure that one parent was (Ww). You remember your Bio class back in VCU and decided to check the ratios in If this cross (Ww X ??) produced 140 plants, and 105 have purple flowers an
Based on Table 15, what are the possible genotypes of the F1 individuals that was crossed in table 14?
chickens, comb shape is determined by alleles at twa loci (R. And P.) Walnut comb is produced w atan one dominant allele Is present at one locus and at least one dominant allele Pis present at a second locus Prototype. A rose comb is produced when at least one dominant allele is present at the first locus and two recessive alletes are present at the second locus (genotype: Rpp). 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 (genotypes wa recessive alleles are present at the first and at the second locus trap), a single comb is produced Progeny with what types of combs and in what proportions will result from the cross between Rp and PP 14 Walnut Pol 1/4 rose comb (Ppl. 1/4 Pea comb (rrPp), 1/4 single comb (rrpp) 16 walnut, 3/16 rosecomb (pp. 3/16 pea.comb (P X. 1/16 single comb (rrpp) O34 rose comb (R PP), 1/4 single comb rrpp) 12 walnut (RPp), 1/2 rose comb (Rpp). O pea (Pp). O single comb…
If two alleles show incomplete dominance O the genotypes of homozygous dominant and heterozygous individuals are difficult to determine. O the genotype of heterozygous individuals can be directly determined from phenotype. O they are inherited at a 3:1 ratio. O they cannot be assessed using the Hardy-Weinberg equation, as there is no recessive allele. O they will be favored during recombination over the recessive allele.