In the tomato plant, red fruit (R) is dominant over green (r). Smooth fruit skin (S) is dominant over peachy skin (s). The genes for fruit colour and fruit texture are linked on the same chromosome. A heterozygous red, heterozygous smooth plant was crossed with a green, peachy plant. The results are given: Smooth-red = 28 Smooth-green 567 Peachy-red = 534 Peachy-green = 34 i. Calculate the map distance between the genes.

Q: Write the genotype and phenotype that would be expected from this cross.  Write the genotype and…

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Q: Perform two consecutive crosses similar to those of Mendel for the following individual plants.…

A: Plants with round seeds (RR) and plants with wrinkled seeds (WR) are crossed (rr). Both parents are…

Q: In sweet peas, gene C or P alone produces white flowers, the purple colour being due to the presence…

A: Dominance is a physiological influence on the same gene locus by an allele over its partner allele.…

Q: n pea plants, tall (T) is dominant to dwarf (t) and yellow (Y) is dominant to green (y).  In a cross…

A: Note: We’ll answer the first question since the exact one wasn’t specified. Please submit a new…

Q: In Drosophila, a cross was made between a yellow-bodied male with vestigial wings and a wild-type…

A: Genes can be defined as an important unit of inheritance. A pair of genes is called allele. These…

Q: Determine the order of these genes on the chromosome.

A: To determine the gene order we first need to identify the genotypes of no cross over (NCO) and…

Q: In a species of bird, feather colour is determined by a single, non-autosomal gene that shows…

A: Given  Feather colour is non autosomal means it is sex based charecter. Parent phenotype  Female -…

Q: In the fruit fly Drosophila melanogaster, the trait of black body is due to a gene on chromosome 2…

A: To determine the recombination frequency and genetic map distance between the two genes, we need to…

Q: In the pearl-millet plant, color is determined by three alleles at a single locus: Rp1 (red), Rp2…

A: Zygosity can be either heterozygous or homozygous. Heterozygous has one recessive allele and one…

Q: All crosses involve many more than one character. So far, only one character has been examined to…

A: The cross between the two organisms to study the two contrasting characteristics or traits is called…

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: Three genes yellow (y) white (w) and cut (ct) are under investigation for possible linkage on the X…

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

Q: Imagine that you set up a three-point mapping cross to determine the order of three X-linked genes.…

A: This is the case of three point test cross. The crossing occurs between the heterozygous parent for…

Q: Two corn plants heterozygous for purple and smooth kernels are crossed. What is the chi-squared…

A: A dihybrid cross between two corm plant heterozygous for purple and smooth kernels are crosses.…

Q: In Drosophila fruit flies, the genes for warped wings (dwp), rumpled bristles (rmp), and pallid…

A: Three point test cross data is given in the question. The three genes are involved in this cross.

Q: In cucumbers, heart-shaped leaves (hl) are recessive to normal leaves (Hl), and having numerous…

A: Given-  1. Heart shaped leaves in cucumber is recessive and is designated as hl 2. Normal leaves are…

Q: In sweet pea, gene C or P alone produces white flowers, the purple color being due to the presence…

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

Q: In a trihybrid cross in garden pea plants that differ in plant height (tall is dominant to dwarf),…

A: It is defined as the cross between an organism having three pairs of contrasting (opposite)…

Q: Imagine that you set up a three-point mapping cross to determine the order of three X-linked genes.…

A: This is the case of three point test cross. The crossing over occurs between the heterozygous…

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 the pearl-millet plant, color is determined by three alleles at a single locus: Rp1 (red), Rp2…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

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: A pea plant has a mendilian completely dominant gene for height lower colour phenotype. A pure…

A: Gregor Johann Mendel is considered to be the father of genetics. He postulated the theories of…

Q: Seed color is controlled by 3 independently assorting bi-allelic genes (P, Q, R), such that…

A: The correct answer to this question: option d. 4:1

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

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Q: Drosophila, white eyes (w) are recessive to red eyes (w+) at one locus and black body (b) is…

A: Linked genes are present on a single chromosome.  In complete linkage ,genes are present close to…

Q: In Drosophila, a cross was made between females—all expressing the three X-linked recessive traits…

A: The genes that are in close proximity will have a very low possibility of occurrence of…

Q: In onion, male sterility is produced when the nuclear genotype is aa and the mitochondrial gene S…

A: The objective of the question is to determine the genotypic and phenotypic ratios of the offspring…

Q: In the garden pea, several different genes affect pod characteristics.A gene affecting pod color…

A: The distance between the two genes on the same chromosome can be measured by genetic mapping. This…

Q: A wild-type male and a wild-type female Drosophila with red eyes and full wings are crossed. Their…

A: Genetics, the study of heredity generally and of genes particularly. genetics forms one in every one…

Q: In some plants a red flower pigment, cyanidin, is synthesized from a colorless precursor. The…

A: Epistasis is a genetic phenomenon in which mutation in one gene affects the mutation in other gene.…

Q: In Drosophila, two genes w and s are X-linked and are 25 map units apal. heterozygous female fly…

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Q: Many of the color varieties of summer squash are determined by two different interacting genes A and…

A: Epigenetics is non allelic interaction between alleles present at different gene locus.

Q: n corn, a colored aleurone is due to the presence of an R allele; r/r is colorless. Another gene…

A: Barbara McClintock’s report that bits of DNA could jump around and integrate themselves into new…

Q: In corn, pigmented aleurone (R) is dominant to colorless aleurone (r), and green plant color (G) is…

A: Given  Green (G) is dominant over yellow (g)  Pigment (R) is dominant colourless (r)  Plant one…

Q: An insect from a strain breeding for white eyes (RRww) was crossed to an insect from a strain…

A: When an organism is heterozygous, it has two distinct alleles of the same gene. For instance, pea…

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

A: In tomato plants, the round fruit shape is dominant over the oval fruit shape. The allele for round…

Q: Phenotypes PAO PAo PaO Pao PAO pAo pao pao x no zygo Number 91 427 6 106 120 7 323 62

A: Given:The fruit berry nispero, Eriobotrya japonica, has the recessive mutant genes p (purpura =…

Q: You are studying three linked genes in snapdragons. The flower color locus is in the center. There…

A: If two or more genes are located on the same chromosome then they are classified as linked genes.…

Q: In cucumbers, heart-shaped leaves (hl) are recessive to normal leaves (Hl) and having numerous fruit…

A: “Dominant and recessive” traits are the two different forms of the gene. The trait which is…

Q: Vermilion eye color in Drosophila is sex-linked and recessive. What would be the phenotypes of male…

A: The sex-linked disease means the gene for the disease is present on X-chromosomes and is recessive…

Q: A diploid plant has red flowers, heavy seeds and large leaves. The plant is a heterozygous for the…

A: The presence of two different alleles at a particular gene locus is called heterozygous.

Q: Two genes, m (apical meristem) and r (starburst rhizosomes), are linked on chromosome #5 in pea…

A: If the genes are linked then they will shows reduce crossingover frequency at meiosis because they…

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.