You start a cross with a true-breeding red-eyed troll and a true-breeding white-eyed troll, and then cross the F1 offspring to make the F2 generation.  In the F2 generation, you collect 3 red-eyed trolls, 8 white-eyed trolls, and 5 pink-eyed trolls.  Use a chi-square test to evaluate whether the data matches your expectation if the trait is controlled by a single gene with incomplete dominance.     In the spaces below, enter the expected number of offspring in each phenotypic group that you would use to calculate your chi square.  Report your expected values to the nearest 0.01. Expected Number of Pink-eyed trolls  Expected Number of Red-eyed trolls  Expected Number of White-eyed trolls    Calculate your chi-square test and answer the following questions: How many degrees of freedom do you have in this test  Do you reject the null hypothesis?  Yes or no?

Q: Convert the expected phenotypic ratio from Part A into the expected probability for each of the four…

A: Dominant traits Round fruit (R) Red fruit (F) Recessive traits oval fruit (r) Yellow fruit (f)…

Q: This question deals with Mendelian Genetics. Read each part carefully before you answer it. In the…

A: Each gene may exists in alternative forms which codes for different version of a particular trait or…

Q: In pigs, let’s assume that a straight tail (T) is dominant to a curly tail (t).  Let us also assume…

A: According to the Mendelian inheritance each gene has two alleles that determines the phenotype of an…

Q: Tomato Plants In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants…

A: Answer: DIHYBRID CROSS : It is the cross made between two traits of an individual.  Phenotypic…

Q: You are trying to determine whether a horn shape (curved = dominant, straight = recessive) in cows…

A: A Test Cross is performed between one unknown genotype and one true-breeding recessive genotype to…

Q: In pea plants yellow seed color, (GG) and round seed shape (WW) seeds are dominant traits, while…

A: Alleles are the alternative forms of a gene that are located on the same locus of a homologous…

Q: In a parental cross of a ADHL disease trait, where the father is affected and the mother is…

A: In the given case, let the dominant allele associated with ADHL disease be “A” and the allele…

Q: Tomato Plants In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants…

A: Dihybrid cross: A dihybrid cross occurs between two organisms that are identical hybrids for a given…

Q: In the garden pea, orange pods (o) are recessive to green pods (+), and sensitivity to pea mosaic…

A: To determine the gamete frequencies of the recombinants and non-recombinants, we need to first…

Q: You have a pure breeding plant with red flowers, yellow seeds and red-veined leaves. You cross this…

A: The involvement of three genes makes this a trihybrid cross instance. Three genes in the parental…

Q: n rats, black fur color is dominant to white fur color, and pointy ears are dominant to round ears.…

A: Introduction:  Law of independent assortment is based on dihybrid cross. It states that inheritance…

Q: In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants with red and…

A: An allele can be recessive or dominant & in the given question two pairs of allele are mentioned…

Q: You are working for a parakeet breeder that has some green birds and some blue birds. You want to…

A: Green is the dominant phenotype.We can determine this because the blue male, who must be homozygous…

Q: A pure-breeding (or true-breeding) individual is homozygous for all genes of interest. From the…

A: True breed refers to the presence of homozygous genotype for each genes.  According to product rule,…

Q: Two genes in tomatoes are 61 mu apart; normal fruit (F) isdominant to fasciated fruit (f ), and…

A: The given cross in tomatoes is between two genes for normal fruit (F) and fascinated fruit (f) and…

Q: You breed a black homozygous mouse with a white homozygous mouse and all the F1 offspring are gray.…

A: When we crossed black homozygous with white homozygous mouse, we got gray color in the F1…

Q: Tomato Plants In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants…

A: According to the concept of genetic linkage, when genes are far apart or on the different…

Q: In rats, black fur color is dominant to white fur color, and pointy ears are dominant to round ears.…

A: Introduction The relationship between two gene variants is referred to as dominant. Each parent…

Q: Tired of watering her garden, your instructor is attempting to grow desert plants. One such plant is…

A: According to Simple Mendelian inheritance , there are two alleles for a gene that determine a…

Q: In fruit flies, long wings (M) is dominant to miniature wings (m) and red eyes (B) is dominant to…

A: Introduction:- Genes are known as the units of inheritance. They are present on the chromosomes, in…

Q: Consider the cross between a male with genotype AaBbCc and a female with genotype AaBBcc, where A is…

A: Genetics helps us understand how traits pass to progeny and it also helps to understand the…

Q: Pepper plants of the species Capsicum annuum produce peppers of 4 different colors (red, orange,…

A: The correct response to this particular question will be, pepper color is controlled by two genes.

Q: Punnett square to determine the expected F2 progeny

A: The mendel's law of independent assortment states that  the alleles for one gene segregate…

Q: a certain species of plant, a dihybrid (round, pink seeds) is mated with a test-cross strain…

A: Recombination between linkage groups is wont to map their distance apart on the chromosome. The map…

Q: Tomato Plants In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants…

A: The test cross is another fundamental tool devised by Mendel . In its simplest form, a test cross is…

Q: Assume that, in a series of experiments, plants with round seeds were crossed with plants with…

A: A gene is present in different forms that are expressed in a phenotype; allele is a one of the…

Q: In pea plants yellow seed color, (GG) and round seed shape (WW) seeds are dominant traits, while…

A: The allele G (dominant) is responsible for yellow phenotype and the allele g (recessive) is…

Q: purple kernel color, while the homozygous recessive genotype causes red kernel color. If corn plants…

A: Each gene has two copies in sexually reproducing creatures like humans and other animals. The two…

Q: FRR) were crossed to pure breeding plants with yellow and oval fruit (ffrr). The red and round F1…

A:

Q: nite (b) in a certain species of flowering plants. If a tes AaBb) results in a 1 tall and white :1…

A: Given that: AB are dominant i.e.. tall and red . ab are recessive i.e.. short and white. After the…

Q: In triffid plants, the color trait and the spikiness trait are controled by two loci that assort…

A: Dominant trait is the one which expresses itself in its heterozygous condition.  A given cross can…

Q: A female salamander with black eyes is crossed to a male yellow salamanderwith red eyes- All of the…

A: Female salamender has black eyes and male salamander has red eyes and yellow color.

Q: Two true-breeding Triffid strains (poison stingers and no stingers) are crossed. AlL F1 progeny have…

A: Pure breeding means when pure dominant and pure recessive parents mate. No heterozygous condition…

Q: Two pea plants are crossed to make 1,000 offspring. All offspring possess long pods and round peas.…

A: In a cross a dominant character is expressed either in the homozygous or heterozygous condition both…

Q: tomato, yellow flowers (Y) is dominant to white flowers (y). A true-breeding yellow flowered strain…

A: This is an example of a monohybrid cross in which only one trait or character is involved.Pure…

Q: Tomato Plants In tomato plants, round fruit (R) is dominant to oval fruit (r). Pure breeding plants…

A: A test cross is a way to explore the genotpye of an organism. When a dominant phenotype i.e…

Q: A plant with the genotype AAbb was crossed with one with the genotype aaBB. The F1 plants were…

A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…

Q: Two gene loci, A and B, are on separate chromosomes and alleles A and B are dominant over alleles a…

A: Dihybrid cross Is a mating experiment involving two creatures that are genetically identical in two…

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.