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: Consider a cross between a true breeding purple flowered pea plant (genotype PP) and a true breeding…

A: Phenotype is the external appearance of an organism.

Q: Suppose that goats have one gene that codes for color, where A is brown and a is white. The goats…

A: A dihybrid cross is a mendelian cross of two characteristics or two different genes representing two…

Q: In mice, there is a yellow strain that when crossed yields 2 yellow:1 black. How could you explain…

A: The genetic characteristic of an organism is known as genotype, and their expression results in…

Q: In the fruit fly, recessive mutations in either of two independently assorting genes, brown and…

A: In Drosophila, as well as in many other plants and animals, pigmentation is highly variable both…

Q: In mice black fur (B) is dominant over white fur (b). What is the phenotypic percentage of offspring…

A: Hi, Thanks For Your Question.  Answer : Correct Option Is 50% Black ; 50% White

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: In cabbage butterflies, White wings are dominant to yellow wings. If a heterozygous white-winged…

A: Genotype can be defined as the complete genetic material of an organism. The term is also used to…

Q: In a strain of tomato plants, short plant height and small fruit size are traits that display…

A: Genes will express according to their nature.If they are dominat to other gene then the dominant…

Q: Medaka fish native to Japan have 24 pairs chromosomes, and medaka fish native to China have 23 pairs…

A: Genetic variations take place in a population due to several reasons. The reasons include random…

Q: Suppose that red flower color (RR or Rr) is dominant to white flower color (rr) in a petunia. A…

A: Taking into consideration just one character and crossing the two plants is called a monohybrid…

Q: at two genes are linked? Describe with an example what would you expect from two linked genes…

A: Genetics is defined as the field of biology that mainly deals with the study of genes, their…

Q: Let’s suppose a genetic disease is caused by a mutantallele. If two affected parents produce an…

A: Genetic disease is defined as an inherited medical condition or state caused by an abnormality in…

Q: When Calvin Bridges observed a large number of offspring from a cross of white-eyed female…

A: Failure in the segregation of daughter chromosomes during the gametogenesis in meiosis-I and…

Q: Three autosomal recessive mutations in yeast, all producing the same phenotype (m1, m2, and m3), are…

A: An autosomal recessive mutation means two copies of an abnormal and defective gene must be present…

Q: In pea plants, the color yellow is dominant over the color green. If a homozygous yellow plant is…

A: Gregor Johann Mendel was an Austrian Monk, who is known as the father of genetics published the…

Q: In mice, short hair is dominant over long hair. If a heterozygous shorthaired male is crossed with a…

A: A gene is the basic structural and functional unit of heredity and is made of DNA(deoxyribonucleic…

Q: In flies, small wings are recessive to normal wings. If a cross between two flies produces 8…

A: The alleles are generally of dominant and recessive type and some other forms like codominant are…

Q: In cats, S = short hair; s = long hair; XC = black coat; Xc = yellow coat; XCXc = tortoiseshell…

A: Inheritance is the process of transmitting the traits from parent to offspring. Traits of an…

Q: Using the punnet square (mono-hybrid cross) solve the following: In some cattle the genes for brown…

A: Codominance is a form of inheritance in which the alleles of a gene pair in a heterozygous are fully…

Q: The long hair of Persian cats is recessive to the short hair of Siamese cats, but the black coat…

A: A dihybrid cross in one in which organisms that differ in two different characters are mated to…

Q: In guinea pigs, black is the dominant fur color. If one half of a litter is white and half of the…

A:

Q: In your own words, explain why a testcross cannot produce more than 50% recombinant offspring. When…

A: The external appearance of an individual for any trait is called phenotype for that trait. For…

Q: Can you determine from the phenotype of their offspring if the parents are homozygous or…

A: The term "phenotype" refers to an organism's visible physical characteristics, such as its…

Q: The recessive allele s causes Drosophila to have small wings, and the s+ allele causes normal wings.…

A: It can be represented as,

Q: In flies, long wings are a dominant trait, and short wings are a recessive trait. Medium wings are…

A: Homozygous individuals mean there is a pairing of the two same types of alleles and both of the…

Q: Holstein cattle suffer from the condition citrullinemia, in which homozygous recessive calves die…

A: Citrullinemia is the condition where ammonia and other toxic substsances acumulates in the body. It…

Q: (A) You cross a true-breeding yellow-bodied, smooth-wing female with a true-breeding red-bodied,…

A: The genotype of the flies can be represented as: Yellow bodied and smooth wing = WWbb Red bodied and…

Q: a) Based upon the results of these crosses, is the dwarfism trait in Andean condors autosomal or…

A: Autosomal and sex-linked inheritance are two types of inheritance. Autosomal inheritance occurs when…

Q: When true-breeding mice with brown fur and short tails (BBtt)were crossed to true-breeding mice with…

A: Genes are the units of heredity that are transmitted through generations. Genes contain the genetic…

Q: When pure breeding red dragons with large wings are mated with pure breeding green dragons with…

A: Let ‘R’ represent the red color allele and ‘r’ represent the green color allele.  Also, Let ‘L’…

Q: In a particular plant, green seed color is dominant to yellow seed color. If all of the offspring of…

A: Since the green seeds are dominant to yellow, the allele for green seeds can be represented with…

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: . Male house cats are either black or orange; females areblack, orange, or calico.a. If these…

A: Part A. As per the date, these traits are X-linked. As we know that cats have X linked orange locus…

Q: In a species of dog, a mutant gene that causes deafness is found on the Y chromosome. What type of…

A: The sex chromosome of dog is XY (Male) and XX (Female). The mutant gene of Y-chromosome is…

Q: A researcher mutagenized a group of butterflies and isolated six butterflies with extra-long bodies.…

A: Mutation is a change in a DNA sequence. Mutations can result from DNA copying mistakes made during…

Q: A black guinea pig is mated to a white guinea pig, and they produce 12 black offspring Then, the…

A: Each gene is inherited from each parent. Therefore, there are 2 copies of every gene called alleles,…

Q: In the case of carnation flower, what do you think a flower carnation would look like if the red and…

A: Incomplete dominance: In this type of inheritance, a third phenotype is produced and this will be a…

Q: In the Dorset sheep breed, both males and females have horns, and the trait is controlled by an…

A: According to our guideline we can answer only the first question. The alleles are the alternative…

Q: The long hair of Persian cats is recessive to the short hair of Siamese cats, but the black coat…

A: Alleles for the characterstics od hair and coat color in persian cat.   Long hair- ll Short hair- LL…

Q: In Drosophila, males from a true-breeding stock with raspberry-colored eyes (instead of normal…

A: True breeding is a sort of mating in which the parents generate kids with the same phenotype as the…

Q: In cats, the gene for calico (multicolored) cats is both sex-linked and codominant. Due to a…

A: Introduction: The X and Y chromosomes, two sex chromosomes, are responsible for determining sex in…

Q: A female from a pure-breeding strain of Drosophila with vermillion-colored eyes is crossed with a…

A: The genes are the hereditary unit of an organism which are passed on from the parental generation to…

Q: Females of wild-type Strain A and males of mutant Strain B, as well as females of mutant Strain B…

A: Reciprocal crosses are done by taking both genotype (once a male and once a female).

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: Suppose that unicorns have one gene that codes for color, where S is silver and s is white. The…

A: When two genes are involved, the cross between them is termed as a dihybrid cross. The genes can be…

Q: The long hair of Persian cats is recessive to the short hair of Siamese cats, but the black coat…

A: Introduction  A gene is consisting of a pair of alleles/factors and can be dominant or recessive. A…

Q: In a cross between a homozygous red-eyed female fruit fly and a white-eyed male fruit fly, what is…

A: Heterozygous alludes to having acquired various types of a specific quality from each parent. A…

Q: In rabbits, black hair is due to a dominant allele B and brown hair to its recessive allele b.…

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

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.