A female animal with genotype A/a ⋅ B/b is crossed with a double-recessive male (a/a ⋅ b/b). Their progeny include 442 A/a ⋅ B/b, 458 a/a ⋅ b/b, 46 A/a ⋅ b/b, and 54 a/a ⋅ B/b. Explain these results.
Q: A series of three-point testcrosses is made to determine the genetic map order of seven linked…
A: An allele is a genetic variant, which is expressed as A (capitalized) when the trait is dominant and…
Q: If you had a fruit fly (Drosophila melanogaster) that was of phenotype A, what cross would you make…
A: The Chromosomal Theory of Inheritance, as given by Sutton and Boveri, states that the genes are…
Q: In cattle, black wool color W is dominant over white w, the heterozygous being roan. In the…
A: Given, Black wool color : WW White wool color: ww Heterozygous Roan color : Ww
Q: In the shorthorn breed of cattle, The red and white coat colors are codominant with each other with…
A: Codominance occurs when both parental characteristics are present in the F1 generation. The progeny…
Q: In Drosophila, the genes A, B, and C are linked and in the order given. The distances are A-B = 5…
A: Linked genes are genes that are located on the same chromosome. Unless they are separated by…
Q: E. W. Lindstrom crossed two corn plants with green seedlings and obtained the following progeny:…
A: Two corn plants with green seedlings were crossed and the offspring obtained are green seedling is…
Q: In mice, albinism (g) is recessive to grey coat colour (G). A grey mouse mated with an albino mouse.…
A: Mendel's laws of inheritance can be used to study effects of genotypic characters on phenotypic…
Q: The F1 from a cross of AABB x aabb is testcrossed, resulting in the following phenotypic ratios: AB…
A: 3) RF= (recombinants/ total)*100 =(190+210)/(308+190+292+210) =40% 1) the genotype for the given…
Q: A fly that is heterozygous at 3 different, independent, autosomal loci (AaBbCc) is crossed to an…
A: The genotype is defined as the genetic constitution or composition of an individual. Thus, it is the…
Q: In a two factor cross, the longest possible map distance is 50 map units. Explain why this is…
A: By finding the recombination frequencies of many gene pairs, we can make genetic or linkage maps. By…
Q: From a series of two-point crosses, the following mapdistances were obtained for the syntenic genes…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: E. W. Lindstrom crossed two corn plants with green seedlings and obtained the following progeny:…
A: Two corn plants with green seedlings were crossed and the offspring obtained are green seedling is…
Q: In mice, black fur (B) is dominant to brown fur (b), and short tails (T) are dominant to long tails…
A: GIVEN; Genes for the color of fur (B) & length of the tail (T) in Mice. B - Black Fur…
Q: The following two genotypes are crossed: Aa Bb Cc dd Ee × Aa bb Cc Dd Ee. What will the proportion…
A: Mendelian genetics is also known as classical genetics that involves the study of the inheritance…
Q: Erminette fowls have mostly light colored feathers with an occasional black one, giving a flecked…
A: In this question, we are given a total progeny of 48 out of which 22 are Erminette, 14 black and 12…
Q: Let’s suppose gene A and gene B are closely linked to each other. An AaBb individual (with the…
A: Given, gene A and gene b are linked closely to each other. An individual with genotype AaBb is…
Q: In a cross between AaBbCcDDee x aaBbCcddEe, what is the probability of obtaining the following?…
A: Product rule is used in this case. The product of probability of each gene is done to find the…
Q: In mice the autosomal genotype yy is for gray fur, YY is for brown fur and Yy is for yellow fur.…
A: DNA ( deoxyribonucleic acid) is the genetic material that the organism inherits from the parental…
Q: In a three-point testcross such as this one, why aren’t the F1 and the tester considered to be…
A: The three-point test cross is used to determine the three genes in loci of a genome organism. The…
Q: The A & B antigens in humans may be found in water-soluble forms in secretions, including saliva of…
A: Antigens are generated in the human body by the allelic activity of the A, B, and O group loci in…
Q: In the F2 generation of this cross, 224/300 embryos develop into wild-type flies, while 76/300 of…
A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…
Q: In mice, albinism (g) is recessive to grey coat colour (G). A grey mouse mated with an albino mouse.…
A: Answer:- Dihybrid cross:- G (Grey coat color) g (albino coat color) G (Grey coat color) GG…
Q: Duchenne Muscular Dystrophy (DMD) is a sex- linked, recessive disease in which a mutation in the…
A: Duchenne’s muscular dystrophy (DMD) is a muscular disorder that is typically inherited by the boys.…
Q: In roan cattle, red (R) and white (W) are codominant. Heterozygous individuals produce both red and…
A: Given that red and white are codominant. When a cross is between Red and white, the individuals…
Q: In goats, a beard is produced by an autosomal allele that is dominant in males and recessive in -…
A: Introduction: The process by which a kid inherits genetic information from a parent is known as…
Q: How does one set up a punnet square for the following problem? I know the answer is supposed to be…
A: Probability is used to express genetic ratios. The expected frequency is the probability of the…
Q: In dogs, dark coat color phenotype (D) is dominant over albino (a) and short hair (S) is dominant…
A: Given Allele D is dominant over allele a Allele S is dominant over allele l D = dark coat…
Q: . In mice, the following alleles were used in a cross: W = waltzing gait w = nonwaltzing gait G =…
A: The collection of genes that make up a person's genotype is referred to as that person's genotype.…
Q: . The pedigree below was obtained for a rare kidney disease.a. Deduce the inheritance of this…
A: Diseases have been researched extensively in the recent times. It is observed that diseases are not…
Q: In the dihybrid cross AaBb ´ aabb, what proportion of individuals are expected to be homozygotic for…
A: In the dihybrid cross between AaBb and aabb, the first parent individual is heterozygous for both…
Q: In the self of a polygenic trihybrid R1/r1 ; R2/r2 ; R3/r3,use the product and sum rules to…
A: When a self cross takes place between the polygenic hybrid, then: The probability in which only one…
Q: Refer to problem 2. Determine the predicted genotype frequencies among the offspring of the…
A: Gregor Johann Mendel is usually defined as the way that they are been regarded as the father of…
Q: A, B,D are three independently assorting genes with their recessive alleles a, b, d respectively. A…
A: Answer .Aa bb dd X aa bb dd is the provided cross. As a result, the children created would be
Q: e coefficient of coincidence,
A: Introduction In hereditary qualities, the coefficient of incident (c.o.c.) is a proportion of…
Q: What is the predicted phenotypic outcome of a dihybrid cross and a dihybrid text cross? Why?
A: Let a round yellow pea be dominant and wrinkled green pea be recessive.
Q: in a cross AaBb X aabb, the following progeny were obtained: AaBb=50 aabb=46 Aabb=7 aaBb=6 What is…
A: Linkage is defined as occurrence of two or more than two genes on the same chromosomes. The genes…
Q: The following two genotypes are crossed: Aa Bb Cc Xr × Aa BB cc X+Y, where a, b, and c represent…
A: Answer: Introduction: The following two genotypes are crossed: Aa Bb Cc Xr × Aa BB cc X+Y. If we…
Q: A cross between two heterozygous individuals in one gene resulted in one phenotype, explain?
A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…
Q: The A locus and the D locus are so tightly linked that norecombination is ever observed between…
A: Introduction Genes can be linked or autonomous. When they segregate during the time of formation,…
Q: If two gene pairs A and a and B and b are assorting independently with A dominant to a and B…
A: To find: To find the probability of the given two gene pairs
Q: Theoretically, what is the expected result from the parental cross of a grey mouse and an albino…
A: Dominant trait is grey coat( G) Recessive trait is albinism (g) The cross is between grey mouse and…
Q: Explain why it is possible for the proband in the following pedigree to have children of blood types…
A: A family may be a representation of our family tree. It appears how people inside a family are…
Q: This is a pedigree for a dominant trait caused by gene A in humans. Shaded symbols show individuals…
A: The trait is a dominant trait. Thus, genotype of people having the trait - AA or Aa. Genotype of…
Q: In dogs, dark coat color phenotype (D) is dominant over albino (a) and short hair (S) is dominant…
A: Given D is dominant over a D gives dark coat colour and a gives albino colour. S is dominant…
Q: A cross between fruit files with genotypes Aa Bb × aa bb produces the following progeny: 10 Aa Bb…
A: In a cross, the arrangement of linked alleles on the chromosomes is critical for determining the…
Q: The father of two children is type O+, and the mother is type A+. The children are O- and A+. Given…
A: Human blood type is determined by co-dominant alleles. There are three different alleles for human…
Q: In fruit flies, Cinnabar eyes are encoded by a recessive allele located on the X chromosome. If a…
A: An allele may be defined as different forms of the same gene. The dominant allele is the one that…
Q: In tomatoes, dwarf (d) is recessive to tall (D) and opaque (light-green) leaves (op) are recessive…
A: Linkage refers to the close co-location of genes or combinations of DNA on chromosomes to one…
Q: The genotypes of F1 individuals in a trihybrid cross are LlMMNn x llMmNn. What is the probability…
A: To find: The probability that the F2 offspring with an LlMmnn genotype
Q: A three-point cross was conducted, 8500 progeny were evaluated, and the genetic map was determined…
A: The genes that are located on the same chromosome will shows reduce amount of crossing over. In case…
A female animal with genotype A/a ⋅ B/b is crossed with a
double-recessive male (a/a ⋅ b/b). Their progeny include
442 A/a ⋅ B/b, 458 a/a ⋅ b/b, 46 A/a ⋅ b/b, and 54 a/a ⋅ B/b.
Explain these results.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
- . a. A mouse cross A/a ⋅ B/b × a/a ⋅ b/b is made, and inthe progeny there are25% A/a ⋅ B/b, 25% a/a ⋅ b/b,25% A/a ⋅ b/b, 25% a/a ⋅ B/bExplain these proportions with the aid of simplifiedmeiosis diagrams.b. A mouse cross C/c ⋅ D/d × c/c ⋅ d/d is made, and inthe progeny there are45% C/c ⋅ d/d, 45% c/c ⋅ D/d,5% c/c ⋅ d/d, 5% C/c ⋅ D/dExplain these proportions with the aid of simplifiedmeiosis diagrams.From parents of genotypes A/A ⋅ B/B and a/a ⋅ b/b, adihybrid was produced. In a testcross of the dihybrid,the following seven progeny were obtained:A/a ⋅ B/b, a/a ⋅ b/b, A/a ⋅ B/b, A/a ⋅ b/b,a/a ⋅ b/b, A/a ⋅ B/b, and a/a ⋅ B/bDo these results provide convincing evidence of linkage?Consider the following dihybrid testcross: B/b • E/e × b/b • e/e For the progeny from this testcross, determine the relative proportions (from 0% to 100%) of each genotype if the two genes: a) are linked (dominant alleles in cis conformation) with no crossing over: Be/be: be/be: BE/be: bE/be: b) assort independently. B/b; E/e: B/b; e/e: b/b; E/e: b/b; e/e: c) are linked (dominant alleles in cis conformation) and 20 map units apart. Be/be: be/be: BE/be: bE/be:
- In a cross between mice the genotypes AB/ab x ab/ab, what is the recombination frequency if the progeny numbers are 72 AB/ab, 68 ab/ab, 17 Ab/ab, and 21 aB/ab? The alleles are shown for each chromosome, separated by a slash (/)Mice of the genotypes A/A ; B/B ; C/C ; D/D ; S/S anda/a ; b/b ; c/c ; d/d ; s/s are crossed. The progeny are intercrossed. What phenotypes will be produced in the F2 andin what proportions? [The allele symbols stand for thefollowing: A = agouti, a = solid (nonagouti); B = blackpigment, b = brown; C = pigmented, c = albino; D =nondilution, d = dilution (milky color); S = unspotted,s = pigmented spots on white background.]Assume that the trihybrid cross AABBrr x aabbRR is made in a plant species. Assume that A and B are dominant alleles, but there is no dominance effect of alleles at the R locus. a) How many different gametes are possible in the F1generation? What are the genotypes of these gametes? b) What is the probability of the parental aabbRR genotype in the F2 progeny? c) What proportion of the F2 progeny would be expected to be homozygous for all three genes?
- Consider three genes L, U, and W, for which the count of F2 phenotypes after a 3-point cross is as follows: Phenotype F2 count: L U w 19 L u W 1 l u W 21 L U W 33 l U W 274 l u w 41 l U w 2 L u w 259 Which of the following statements about genes L, U, and W are TRUE? (may be more than one correct ans) A. L, U, and W are each on a different chromosome B. Only U and L are on the same chromosome C. Only U and W are on the same chromosome D. Only W and L are on the same chromosome E. L, U, and W are all on the same chromosomeUsing the conventions of Figure 4-15, draw parents andprogeny classes from a crossP M′′′/p M′ × p M′/p M′′′′What are the expected phenotypic ratios from the following cross:Tt Rr yy Aa × Tt rr YY Aa, where T = tall, t = dwarf, R = round,r = wrinkled, Y = yellow, y = green, A = axial, a = terminal; T, R,Y, and A are dominant alleles. Note: Consider using the multiplication method in answering this problem
- The non-wild-type alleles are k (clipped wings), l (long tail), and m (magical powers). The parental stocks are homozygous doubly recessive flies of genotype k+/k+ · l/l · m/m and homozygous singly recessive flies of genotype k/k · l+/l+ · m+/m+. From this cross, triply heterozygous progeny of genotype k/k+ · l/l+ · m/m+ are obtained, and females of this genotype are testcrossed to triple recessives of genotype k/k · l/l · m/m. The genotypes determining the eight progeny types from this testcross (CROSS C) are shown here with their numbers, out of a total sample of 1,572 flies. What is the correct order of the genes? What number of progeny for each genotype would you predict in the case of independent assortment? What is a non-recombinant genotype? What is a genotype of a single crossover? What is a genotype of a double crossover? What is the longest distance between any of the two dragon alleles above? What is the shortest distance between any of the two dragon alleles above?…From a cross (Xyz) / (xYZ) x (xyz) / (xyz), where X,x, Y,y and Z,z represent alleles of three linked genes whose relative order is unknown, the least frequent classes of progeny are genotype (xyz) / (xyz) and (XYZ) / (xyz). What is the correct relative order of genes X, Y and Z? Answer using lowercase letters separated by a dash (-). Example: x-y-zHow does one set up a punnet square for the following problem? I know the answer is supposed to be 3*1/2*1/4*1/4 = 3/32 but I'm not sure how we get these numbers. Please help!Question: In the self of a polygenic trihybrid R1/r1; R2/r2; R3/r3, use the product and sum rules to calculate the proportion of progeny with just one polygene “dose.”