The following table describes the merle gene expression. Genotype Phenotype MM White Mm Half colour (Grey or light red) mm Full colour (Black or Red) A grey dog that is heterozygous for the eumelanin gene mates with a light red dog. What is the probability they would have a grey puppy? Select one: a. 0.50 b. 0.25 c. 0.38 d. 0.13

Q: The BCRA-1 allele is associated with very high risk of breast and ovarian cancers. Is this allele…

A: The mutation accumulation (MA) theory describes that if harmful or deleterious mutations are…

Q: Certain genes determine sex, fertility, and viability in Drosophila, and mutations in these genes…

A: Drosophila shows various gene expressions in sex differences. They show sexual dimorphism in gene…

Q: a. In which sex, XY males or XX females, would the Sxl protein bind to the msl-2 mRNA? b. As…

A: Drosophila sex determination and dosage compensation are primarily controlled by two distinct sets…

Q: (A) Which of the above offspring are recombinant? (B) What is the map distance between the genes?

A: ANSWER1. Recombinants: These are those offspring that have traits different from their parents.…

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: What type of phenotypic effects might you expect from a large chromosome deficiency (deletion) that…

A: Deletion is a type of  Chromosomal  aberration in which there is loss of segment of a  chromosome.In…

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

A: The gene in question is thought to be important, and the deadly allele can be dominant or recessive.…

Q: Illustrate the Parental and F1 cross

A: Trihybrid cross is between the two individuals of a species for studying inheritance of three pairs…

Q: What are the expected phenotypic ratios in the F, generation? If one of the F, males is mated to an…

A: The cross is between red bar-eyed female and purple normal eyed male. The genotype of the female is…

Q: A recessive mutation pd causes purple eyes in Drosophila, in contrast to the wildtype red eyes. A…

A: The objective of this question is to determine the proportion of offspring that will have purple…

Q: A male has a particular X-linked recessive genetic disorder. His partner is normal, but her father…

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

Q: The color of chickens is determined by interacting loci: AA or Aa give white, aaBB or aaBb give…

A: AA o Aa = dominant (white) aa = recessive (color)

Q: THEME 3: In Drosophila recessive mutants called a, b, c, and d all have the same phenotype; namely,…

A: Wild type individuals result when the Plus sign is indicated and this Plus sign occurs when the two…

Q: The term epistasis is used to refer to a situation in which the expression of a gene is influenced…

A: Epistasis is a phenomenon in genetics in which the effect of a gene mutation is dependent on the…

Q: In mice, coat color is due to the inheritance of three genes located on three different chromosomes.…

A: The genotype forms a genetic makeup of a cell, and therefore also determines the phenotype of any…

Q: The pedigree below shows the inheritance pattern of a rare X-linked allele for one family. The…

A: Pedigree is a family chart where genetic councillor put some symbol for easy description of a…

Q: A recessive mutation pd causes purple eyes in Drosophila, in contrast to the wildtype red eyes. A…

A: The objective of this question is to determine the proportion of offspring that will have purple…

Q: Parent Cross: Blue-Eyed Male x Normal Female Blue-Eyed Female F1 Offspring Normal Male Normal Female…

A: Drosophila melanogaster. The position of the white eye gene, positioned at the x-chromosome of this…

Q: The genotype of a dwarf mouse is Igf2 Igf2–. What is the genotype of its father who has normal body…

A: Knowing how features are passed down from parents to children requires incorporating knowledge of…

Q: The dosage of X chromosome expression is equalized between male and female mammals.  Think about the…

A: Calico cats produce a fur coat exhibiting both orange and black colors. The coat color gene is…

Q: what is the approximate map distance between the two genes?

A: Linkage is a phenomenon which determines how genes are placed in close proximity to each other.   It…

Q: A RFLP is discovered that is linked to the gene for Duchenne’s muscular dystrophy (DMD). DMD is an…

A: RFLP (Restriction Fragment length polymorphism) : RFLP (Restriction Fragment length polymorphism is…

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

A: Mutations are alterations in the DNA sequence of an organism. Small changes, such as adding or…

Q: In the yawncat (a rare hypothetical animal), the dominant allele R causes solid tail color, and the…

A: ANSWER;- A). 1/16

Q: Are the genes linked, unlinked, or incompletely linked? In Drosophila, white eyes (w) and vestigial…

A: In Drosophila, white eyes (w) and vestigial wings (vg) are recessive traits to the red eyes and wild…

Q: eye colour body colour wing type -4 map units 6 map units 10 map units Refer to the illustration…

A: Linkage is the close association of genes or other DNA sequences on the same chromosome. Genes which…

Q: The process known as (FILL IN THE BLANK)  of the (FILL IN THE BLANK) chromosome in some female cats…

A: Calico cats are tri-colour cats that have three dominant colours on their coat fur namely orange,…

Q: Genes on one gene that affect the expression of genes at different locations are said to be alleles…

A: Some genes are independent and some affect other genes.

Q: A male mouse that is heterozygous for a mutant lgf2 allele (Igf2/lgf2-) is crossed with a female who…

A: A mutation is a change in the DNA sequence of a gene or chromosome within an organism. Mutations can…

Q: In cells with more than one X chromosome, one X chromosome is inactivated. The opsin1 gene is on the…

A: In individuals with two X chromosomes, a phenomenon known as X chromosome inactivation occurs,…

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.