Suppose that you are tending a mouse colony at a genetic research institute, and one day you discover a mouse with twisted ears. You breed this mouse with twisted ears and find that the trait is inherited. Both male and female mice may have twisted ears, but when you cross a twisted-eared male with a normal-eared female, you obtain results that differ from those obtained when you cross a twisted-eared female with a normal-eared male: the reciprocal crosses give different results. Describe how you would determine whether this trait results from a sexlinked gene, a sex-influenced gene, genetic maternal effect, a cytoplasmically inherited gene, or genomic imprinting. What crosses would you conduct, and what results would be expected with these different types of inheritance?

Q: A type of tomato (Solanum lycopersicum) produces fruit in three possible colors: red, orange, and…

A: It is seen that a single gene can code for more than one character, while in some cases many genes…

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: Two pure-breeding strains of flies are mated, and the F1 are intercrossed.  The first strain has…

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

Q: . A doubly-homozygous red-flowered plant is crossed with a doubly-homozygous white-flowered plant.…

A: Phenotype refers to the traits that can be observed physically such as height or color. So…

Q: hen crossing a true breeding white mouse with a true breeding brown mouse your friend tells you she…

A: Genes are the functional unit of heredity. They contain information that is transferred from one…

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: 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: Deduce the phenotypic proportions in the progeny of thefollowing crosses of autotetraploids in which…

A: Phenotypic proportion shows the ratio of offspring's combination genes and these are similar in the…

Q: In a species of roses, the alleles RP and RR code for pink roses and red roses, respectively. In…

A: Paramutation represents a unique interaction between alleles where one allele induces a heritable…

Q: In the fruit fly, Drosophila melanogaster, eye color is affected by an X-linked gene with two…

A: The objective of this question is to predict the phenotypes of the F1 and F2 generations in a cross…

Q: Cross #1: P: F1 Fs Homozygous scarlet-eyed males Homozygous brown-eyed females X 1072 Wild-type…

A:

Q: What is the genetic distance between red petals and waxy texture?

A: Gene distance  Gene distance means the number of bases present between two gene. On the basis of…

Q: In your experiments with Drosophila, you found that the wildtype allele that codes for grey adult…

A: A person exhibiting a dominant phenotype may have a total of two copies of the dominant allele or a…

Q: A recessive maternal effect mutant in zebrafish, called ichabod, results in embryos lacking heads…

A: The correct answer is option C.

Q: Suppose a species of tulip has three alleles for the gene that codes for flower color. The CR allele…

A: CRCB × CBCW:Possible combinations: CRCB × CB, CRCB × CWExpected phenotypic ratio: 1 : 1 : 0 : 0 (red…

Q: In crosses between mutant mice, you find the following patterns in the genotype for the A locus…

A: Given:Genotype data for the A locus containing alleles A1, A2, A3, and A4 in mutant mice.The…

Q: Vestigial wing is a recessive autosomal mutation in the fruit fly Drosophila melanogaster. Wild-type…

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

Q: Drosophila eye color is determined by a single gene. Supposed you collect a population of drosophila…

A: Inheritance patterns are of different type’s   Mendelian inheritance, incomplete dominance,…

Q: A) Calculate the map distance separating the three genes B) Which gene is in the middle?

A: Symbol  white eyes = r short wings = l  ebony bodies = g    red eyes = R long wings = L  Gray bodies…

Q: In fruit flies (Drosophila melanogaster), the bn+ allele for normal dull red eyes is dominant to the…

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

Q: In corn, the genes that determine seed color and coat are both located on chromosome 9.  Seed color…

A: This analysis of a corn dihybrid cross revealed that seed color and coat texture are controlled by…

Q: Cross #1: P: F1 Fs Homozygous scarlet-eyed males Homozygous brown-eyed females X 1072 Wild-type…

A: 1. F2 generation phenotypic ratio is the chance of getting scarlet eyes, and  brown eyes is Half…

Q: Your internship with Dr. Nefario at Gru Industries is going well so far, but a recent mission to…

A: This question asks us to apply the principles of Mendelian genetics to a hypothetical situation…

Q: Coat color in mice is influenced by two genes, one for color (A) and one for the amount of pigment…

A: Epistasis is the interaction of non-allelic genes in which the effect of one gene is obscured by…

Q: Suppose a student performs a three-point test cross with mice involving mouse genes T, V and D. If…

A: Three point test cross:- it is usually used to study the sequence and position three genes present…

Q: In the mapping example in Fig 2, the dominant alleles were on one chromosome and the recessive…

A: Genetics is the study of inheritance and heredity. Alleles are the different forms of a gene. Allele…

Q: In Drosophila, males from a true-breeding stock with raspberry-colored eyes were mated to females…

A: Drosophila:  Fly species belonging to the taxonomic order Diptera and family Drosophilidae include…

Q: In corn, two independent, recessive nuclear genes, japonica (j) and iojap (ij), produce variegation…

A: Japonica heterozygous gene- Jj Cross between Jj × Jj Gametes J j J JJ Jj j Jj jj The…

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.