In a certain plant, the dominant form of gene B codes for blue fruit, while the recessive form results in pink fruit. The dominant form of another gene, E, inhibits the activity of the enzyme coded for by gene B, resulting in white fruit, while the recessive form is unable to inhibit this enzyme and results in colored (i.e., blue or pink) fruit. A doubly-homozygous dominant white-fruited plant is crossed with a pink-fruited plant. The F1 progeny were then self-crossed to generate the F2 generation. Determine the ratios of genotypes and phenotypes for each generation.

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

A:

Q: Two unlinked genes, A and B, encode very similar enzymes involved in the production of purple flower…

A: In the given context, there are two independent genes, denoted as A and B, which are responsible for…

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: There are some members of the genus Datura that are trisomic for the chromosome set, which carries…

A: The cross between P+P+P X P+P is done in step 2

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: You have a purple-flowered pea plant, but you do not know if it is homozygous (PP) or heterozygous…

A: The P allele encodes purple flower. This allele is dominant over p allele. The pp encodes white…

Q: The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by a recessive…

A: It is given that the vestigial wing and hairy body are caused by recessive wings. These are encoded…

Q: In pea plants yellow seed color, (GG) and round seed shape (WW) seeds are dominant traits, while…

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

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: The non-wild-type alleles are k (clipped wings), l (long tail), and m (magical powers). The parental…

A: Here the test cross that produced 1572 offspring was conducted between k/k+  l/l+  m/m+…

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: You have a pure breeding plant with red flowers, yellow seeds and red-veined leaves. You cross this…

A: The involvement of three genes makes this a trihybrid cross instance. Three genes in the parental…

Q: In garden pea plants, axial flower location is dominant (A) to terminal flower location (a). If two…

A: Gghh

Q: PURPLE VESTIGIAL DIHYBRID CROSS In the parental generation, you mate a pure-breeding wild-type…

A: Introduction  A dihybrid cross is made up of two individuals who have two features that are…

Q: A cross between two red flower plants produces 2/3 progeny that are red and1/3 progeny that are…

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

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: Let S and s be the alleles for seed shape (spherical and wrinkled, respectively) in garden peas.…

A: Trait is a characteristic feature that is unique to a specific individual. Each trait is represented…

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 a certain type of pea plant, the gene for yellow color (Y) is dominant to the gene for green…

A: Answer: Heterozygous : When the both alleles present are of different types (dominant allele and…

Q: The phenotype of crooked wings (cw) in Drosophila melanogaster is caused by a recessive mutant gene…

A: The expected phenotypes as per the dihybrid phenotype ratio and their proportionate numbers out of a…

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.