A population of white leghorn chicken has the following dominant mutations: crested head, the condition of having elongated feathers on the crown of the head, is dominant to normal-feathered head naked neck, the condition having no neck feathers, is dominant to normal-feathered neck Both are unlinked autosomal genes. A rooster is heterozygous for both of these traits. It mates with a hen that is also heterozygous for both traits. What is the percentage of their offspring that are predicted to have a normal-feathered head and naked neck? (Round your answer to one decimal place). For full marks, your work must be clearly shown

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: In mice, the A allele causes agouti fur, the AY allele causes yellow fur and is dominant to the A…

A: Lethal alleles are those that cause the death of the entity that carries them.

Q: Based on the same data from the previous question:   cu  jv  se        31 +   +   se       99…

A: In Drosophila, curled wings (cu), javelin bristles (jv) and sepia eyes (se) are autosomal recessive…

Q: Horses have three basic coat colors: red (or chestnut), bay, and black. All the colors are…

A: Some phenotypes are determined by the additive effect of 2 or more genes on a single character.

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: Pigment of chicken feathers is regulated by two genes, the gene for feather pigment C, and a gene…

A: Dominant character is always expressed in homozygous or heterozygous condition whereas recessive…

Q: n birds there are two genes that both influence feather phenotype. The first is an autosomal gene…

A: A Punnett square is a statistical tool that helps in understanding the probabilities of different…

Q: A fruit fly that is heterozygous for the autosomal recessive mutations black (b) body, purple (pu)…

A: Formulas for three point test cross - A. Distance between two genes = (#progenies obtained by SCO…

Q: Black fur is dominant over gray. If a father is heterozygous dominant and the mother is homozygous…

A: Given data: Black fur is dominant over grey. Thus, B will represent black fur and b = grey fur…

Q: Three linked autosomal loci were studied in Smurfs.  Locus Dominant Allele Recessive Allele…

A: The objective of this question is to determine the order of the loci and the map distances between…

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: Researchers studying blind cave fish that lack eyes found that crossing two pure-bred fish from the…

A: Within the puzzling depths of caves, analysts have found fish that have adapted to their environment…

Q: Penile hypospadias, a birth defect in male humans in which the urethra opens on the shaft instead of…

A: Given, Penile hypospadias, is disease or a birth defect in male humans in which the urethra opens on…

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: In bears fur colour can be either yellow or tan, and is determined by two alleles of the C gene. A…

A: A genetic trait is considered dominant if it is expressed in a person even in its single copy. While…

Q: In canaries, feather length is determined by a sex-linked gene at the G locus with two alleles. The…

A: Feather length is sex-linked so it will be decided by X chromosome whereas trait of plumage will be…

Q: Long ears in rabbits is an autosomal dominant trait. You cross a rabbit that is heterozygous for…

A: INTRODUCTION Heterozygous They have two different allele for a trait. Homozygous They have two same…

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: A gene that encodes collagen in an animal particiaptes to control size. An animal homozygous for the…

A: A gene that encodes collagen in animal cells helps to control the cell size. An animal trait…

Q: Pigeons display a high color variety, here we try to understand the genetic basis of mixed red &…

A: This question explores the genetic basis of mixed red and black stippling of the feathers (kitey)…

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: The pedigree shown here involves a trait determined by a singlegene (affected individuals are shown…

A: Introduction  Pedigree Analysis: this is the new approach to study the inheritance pattern in the…

Q: Guinea pigs have curly or straight hair, where the curly gene is recessive. Guinea pigs can also…

A:

Q: Suppose a mutant fruit fly with blue eyes was recently discovered. It is later determined that the…

A: The most common and popular way to represent mutant and wild-type alleles in Genetics, is by using…

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: Pink eye and albinism are two recessive traits found in the deer mouse, Peromyscus maniculatus. In…

A: In this case, albinism and pink eye color are recessive traits found within the deer mouse…

Q: In peas, round (R) is dominant to wrinkled. (r )You cross a round pea plant to a wrinkled pea plant…

A: Gregar Johann Mendel, was an Austrian monk, who studied at Vienna University. He worked with me due…

Q: In humans, there are three alleles for blood type: A, B, and O. A and B are codominant over O. A…

A: Blood group inheritance is multiple allelic in nature. Type A blood group can have IA IA/ IA i…

Q: Genes a and b are 20 cM apart. An a+ b+/a b individual was mated with an a b/a b individual. Which…

A: The question is asking us to identify the incorrect statement about the relationship between genes a…

Q: Sex determination in birds is different from that in humans. The sex chromosomes in birds are called…

A: Sex ratio is defined as the ratio of males and females in the population. Generally in sexually…

Q: In otters fur colour can be either yellow or brown, and is determined by two alleles of the C gene.…

A: In otters, fur color can be either yellow or brown and is determined by two alleles of the C gene.

Q: In birds there are two genes that both influence feather phenotype. The first is a sex-linked gene…

A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…

Q: In fruit flies, brick-red eye color is dominant to a bright orange color called cinnabar. A fruit…

A: The correct Answer is C

Q: The genes for black and white chickens are codominant. A black chicken (Bb) crosses with a white…

A: Introduction  In terms of genetics, codominance is a sort of inheritance in which two distinct…

Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.