The same team of researchers sets up an additional cross with this same population. They cross two flies that both have brown bodies. This results in 68 offspring that all have brown bodies.   What assumption(s) can they make about the genotypes of the parental flies? How should they proceed in order to address these assumptions?

Q: A wild-type fruit fly (heterozygous for gray body color and wings) mated with a black fruit fly with…

A: Need to find the recombination frequency between the two genes.

Q: A rosy-eyed Drosophila was crossed with a forked bristle Drosophila. The F1 were all wild-type while…

A: The correct answer is b) RrFf x RrFf. Here's how we can arrive at this conclusion:Analysis of the…

Q: Phenotyle Obseoved + ++ 423 PR VG BL 4iyJ Parental. PR+ BL r597 single + VG + Cross 50 + + BL Over…

A: Step 4 is only asked. So solving the step 4 only. Given: Phenotype Observed   +++ 423 Parental…

Q: Q6. Guinea pigs, which were homozygous for long, black hair were crossed with ones which were…

A: Given, guinea pigs which were homozygous for long, black hair were crossed with the ones which were…

Q: For linkage analysis, a test cross is used rather than a hybrid cross. Why is this essential? Why…

A: Gene mapping signifies the determination of the locations of the components in a genome with…

Q: The table below shows the progeny of a test cross of a heterozygote (JjBbRr).  Each row shows the…

A: Q.Ans:- Explanation:- Recombination Frequency:- Recombination frequency is defined as how many…

Q: A series of crosses were performed between pure breeding lines of mice with different coat colours.…

A: Gene interaction is a type of interaction between two or more genes which results in a single…

Q: I have a vial of F2 offspring resulting from a two-generation cross between true-breeding wildtype…

A: b) Pink body color females:Expected number = Total number of flies * Probability of being pink= 120…

Q: Consider the first category of test-cross offspring shown in figure 8.2 (+b, LS). Consider also that…

A: In the test-cross in question, heterozygous female flies with the genotype +b, LS were used. In…

Q: Two haploid strains of S. cerevisae (yeast) are crossed. One has the genotype ABC and the other abc.…

A: Introduction :- A cell with a single set of chromosomes is referred to as haploid. The number of…

Q: Cross Cross A Cross A Cross B Cross B Phenotype F1 generation F2 generation F1…

A: The objective of the question is to determine the genotypes of the flies in different crosses and…

Q: You have been tasked by a pharmaceutical company to generate a novel strain of Cannabis sativa for…

A: The union of male and female gametes and/or nuclei from the same haploid, diploid, or polyploid…

Q: A set of hermaphrodite self-crosses and male x hermaphrodite crosses were established, and the…

A: A hermaphrodite is an organism that possesses both male and female reproductive organs within a…

Q: Which of the following statements is TRUE?

A: When two or more genes are present on the same chromosome then they are linked and this phenomenon…

Q: State the expected ratio of ebony to non-ebony flies in the F2 generation.  State the expected…

A: The Ebony, non-Ebony, Stubble and non-Stubble are the phenotypic characteristics of a fly. According…

Q: Which sample carries a derived X chromosome with a translocation due to ectopic crossover between…

A: In humans, sex is determined based on the presence or absence of sex chromosomes called the " X"…

Q: Which of the following statements about crossover is FALSE?     Frequent crossover between linked…

A: Crossing over refers to the exchange of genetic material between two homologous chromosomes and…

Q: A geneticist identifies 117 recombinant offspring out of a total of 1,359. What is the recombination…

A: Recombination frequency is the frequency with which a single chromosomal crossover will take place…

Q: Growth Rate 80 red fast 88 purple slow 18 red slow 14 purple fast What is the distance…

A: Here, in 3rd and 4th case there are recombinant progenies because they have different growth rate…

Q: There are two genetic loci determiningthe mating type, locus A with 288 alleles and locus B with 81…

A: The objective of the question is to understand the mating compatibility of Schizophyllum commune…

Q: - A researcher crossed two plants, and informed an assistant researcher to determine the genotypes…

A: The plants obtained have the phenotype of 30 green color pods and 10 plants with yellow pods, among…

Q: fruit flies, you are studying three genes, whose recessive alleles can generate interesting traits.…

A: The greater number are of parental type in a three point test cross. We have to look for the…

Q: The balancer chromosome includes GFP and a mutation in gene X that causes flies to be sterile in the…

A: A homozygous mutation is one that affects both the paternal and maternal alleles. Compound…

Q: A cross in plants is done between the parents CCDD and ccdd to create a dihybrid F1 plant. This F1…

A: Introduction: Genetic variation refers to the differences in genetic material that exist among…

Q: Consider a situation where F1 is backcrossed with one of its parental lineage and we obtained…

A: Introduction An allele is an alternative form of a given gene, meaning it is one of two or more…

Q: You collected the following results from a test-cross you set-up using fruit flies. 52 wildtype…

A: Fruit flies ( Drosophila ) are test crossed with each other .  Results obtained are :-  A ) Wild…

Q: phenotypes: 42 MP; 374 Mp; 367 mP; 27 mp.  What can you conclude from these data

A: Recombinant offspring are children that have a different allele combination to their parents.

Q: I have a vial of F2 offspring resulting from a two-generation cross between true-breeding wildtype…

A: Approach to solving the question:To determine the expected numbers, I applied Mendelian genetics…

Q: |You are studying three traits in a goldfish variety; body colour (A or a), tail length (B or b) and…

A: Part B. A true breeding gold fish with long curly tail is crossed with a true breeding gold fish…

Q: The images attached show a parental cross that is homozygous wild female x white male. F1 were…

A: Chi-square (X2) test is performed to compare the observed data of an experiment with the expected…

Q: You observe that 50% of the offspring of a two-locus mapping cross are recombinant.  You could…

A: Recombinant or recombination frequency can only be upto 50% and can not be over 50%.  The largest…

Q: I am studying a pair of genes, A and B, that I think are both located on the same chromosome.  After…

A: The characters or traits are usually inherited from one generation to another via genetic…

Q: In Figure 5-17, how many crossovers are required to produce a completely prototrophic exconjugant?

A: The cell division causes the formation of identical daughter cells from the parent cell. The types…

Q: Does a molecular marker have to be polymorphic to be useful in physical mapping studies? Does a…

A: Molecular markers are fragments of deoxyribonucleic acid (DNA), which are associated with a specific…

Q: Which of the following are true statements regarding linkage disequilibrium? Please select all that…

A: linkage disequlibrium occur at  non-random.

Q: You cross two plants and get the following results: Recombinant progeny type A: 43 Recombinant…

A: Crossing over is the exchange of genetic material between non sister chromatid of chromosome causes…

Q: Below are the results from a 3 gene testcross between an XxYyZz plant and an xxyyzz plant: Testcross…

A: If the genes are located on the same chromosome then they are classified as linked genes. In this…

Q: You are a biologist studying the local butterfly population. You've discovered 4 white (albino)…

A: Complementation Group - A group of mutant genes which do not complement each other equivalent to a…

Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.