In goats, development of the beard is due to a recessive gene. The following cross involving true-breeding goats was made and car- ried to the F2 generation: P;: bearded female x beardless male F1: all bearded males and beardless females ´1/8 beardless males | 3/8 bearded males 3/8 beardless females 1/8 bearded females F; × F, Offer an explanation for the inheritance and expression of this trait, diagramming the cross. Propose one or more crosses to test your hypothesis.

Q: In Drosophila, the sepia mutation (se, chromosome 3, position 26) results in dark brown eyes, while…

A: Introduction :- D. melanogaster is an ideal model organism due to a variety of characteristics. The…

Q: The production of eye-color pigment in Drosophila requires the dominant allele A. The dominant…

A: Inheritance is defined as the process by which genetic information will be passed or transmitted…

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 humans, four different blood types (A, B, AB, and O) are encoded by three alleles 1. I. and &…

A: Antibodies and antigens are types of blood proteins that vary from person to person. Antigens are…

Q: This pedigree consist of cystic fibrosis that is an inherited disease caused by f a recessive…

A: Cystic fibrosis is a genetic disorder in which the gene that produces the cystic fibrosis…

Q: Consider the following dihybrid testcross: B/b • E/e  ×  b/b • e/e For the progeny from this…

A: If the genes are completely linked, then only parental progenies will be formed. If the genes show…

Q: A certain plant species has dominant red flower color (R) to the recessive white flower color (r). A…

A: Introduction Inheritance is the process of transmitting traits from parent to offspring. The traits…

Q: In beetles, an X-linked gene determines body size, with normal size (M)completely dominant to…

A: A genetic cross is an experimental breeding process performed to understand the patterns of…

Q: Earlobe attachment is controlled by a single gene.  The free (F) condition is dominant over the…

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

Q: Mouse fur color is affected by TWO unlinked loci. GG or Gg mice are agouti. Mice with genotype gg…

A: The phenomenon by which the expression of one gene expression is modified by another gene. The…

Q: A woman with blood type A, who is heterozygous for both blood type and Rhesus factor, had a child…

A: The Human Blood group is a classic example of multiple allelism and co-dominance. ABO blood type in…

Q: Cross a heterozygous dominant purple flowered plant to a recessive white flowered plant. What is…

A: From the monohybrid cross, Mendel’s law of segregation was given. According to this law, when two…

Q: You are studying tail length in a species of mice, where some mice have long tails and some have…

A: Genetics is the study of genes, their interactions, and the effect of environment on genes. Broadly…

Q: Cross 1 AaBb x AaBb Cross 2 AaBbCc x AaBbCc a) Please use a branching diagram to find the…

A: A branching diagram, also known as a Punnett square, can help determine the genotypic ratios of the…

Q: A recessive epistasis cross gives in the F2 a 9:3:4 phenotypic ratio. What is the expected…

A: Epistasis: one gene interferes with the expression of the other gene.

Q: The A & B antigens in humans may be found in water-soluble forms in secretions, including saliva of…

A: Antigens are generated in the human body by the allelic activity of the A, B, and O group loci in…

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: A parental cross between homozygous wild-type red eyed females (X+ X+) were crossed with white eyed…

A: Chi-square (X2) analysis helps us to compare the observed data of an experiment to the expected…

Q: Hereditary canine spinal muscular atrophy (HCSMA) is a motor neuron disease in Brittany Spaniels.…

A: Hereditary Canine Spinal Muscular Atrophy (HCSMA), a motor neuron disease affecting Brittany…

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: Miniature wings (Xm) in Drosophila result from an X-linked allele that is recessive to the allele…

A: Given: Miniature wings Xm - recessive Long wings X+ - dominant Male parent - long wings Female…

Q: In the Bombay phenotype, a homozygous recessive individual hh appears to have blood type O

A: Blood group in human beings is determined by ABO, Rh factor and Bombay phenotype.

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: ee different crosses decide the most likely genotype of each of the parents. Use the gene symbols…

A: In this case, Complete dominance at both gene occurs but one gene, when homozygous recessive, is…

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: Identify the four possible gametes produced by the following individuals (Y = yellow, y = blue, S =…

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

Q: Assuming a pure-breeding P generation, what ratio would you expect in the F2 generation if a mutant…

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

Q: Cross a heterozygous dominant purple flowered plant to a recessive white flowered plant. What is…

A: Mendelian genetics discusses the principles of inheritance of a trait. Mendel proposed three basic…

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: Imagine a cross between a man and a woman having the following genotypes:    Genotype of the…

A: Dominant allele In genetics, it refers to the situation of one allele masking the affect of other…

Q: What is the probability that a child will test as type A blood from parents with the following…

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Q: Miniature wings in Drosophila result from an X-linked allele (w) that is recessive to the allele for…

A: The allele for miniature wings is represented with w And the allele for long wings with + The allele…

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.