A population of sea urchins off the coast of Jacksonville has either long or short spines. The short spines are regulated by the dominant allele. During Hurricane Bishop, an aquarium supply store that breeds octopi is flooded and all of the octopi escape into the ocean. The octopi have an affinity for the short-spined sea urchins, because they are,not as capable at defending themselves, and gobble them up. The next generation of sea urchins has a higher frequency of the long spine allele. What force of evolution is acting upon the sea urchins?

Q: Suppose that the X-linked recessive condition hemophilia A affects 1 in 5000 males in the United…

A: The equation is typically expressed as: p^2 + 2pq + q^2 = 1Here:1. p represents the frequency of one…

Q: br br RASE BERr BR BbRr BR BbRr BURr How many F, Guinea pigs may have black eyes and rough fur? How…

A: When two or more than two characters are taken into a cross it is called as polyhybrid cross,…

Q: In Mexican hairless dogs, a double dose of a dominant allele may be lethal. What phenotype should…

A: The condition where two identical genes are present in an individual for a particular character, Is…

Q: Kayla breeds and sells true-breeding green tree frogs.  At a frog convention, she bought a single…

A: Let's assume the genotype of true breeding Green tree frog is GG and the genotype of yellow tree…

Q: In dogs, albino white coat color is an autosomal recessive trait, while black coat is a dominant…

A: Autosomal recessive trait Autosomal traits are those that are controlled by somatic cells (not the…

Q: A yellow female Labrador retriever was mated with a brown male. Half of the puppies were brown, and…

A: To find why the same female Labrador retriever, when paired with a different brown male, might…

Q: In dogs, albino white coat color is an autosomal recessive trait, while black coat is a dominant…

A: Autosomal recessive trait Autosomal traits are those that are controlled by somatic cells (not the…

Q: Global warming is causing more and more ice to melt each year at far-northern latitudes, exposing…

A: Which of the following is a plausible explanation of how the brown fur trait appeared in these polar…

Q: In a particular mammal, having long whiskers is a SEX-INFLUENCED trait; in FEMALES, long whiskers is…

A: Given  Trait is sex influenced  Long whiskers - dominant in female (recessive in male) Short…

Q: As you have read, if an allele is paired with another one just like it, the name for the pair is…

A: Genes control the genetic characteristics of an organism.  Genotype is the genetic characteristics…

Q: What effect explains the phenotypic difference in coat color of this individual Arctic Fox from…

A: In biology, camouflage refers to an organism's capacity to blend in with its environment and evade…

Q: Blue snorks are dominant to pink snorks. You come across a field of all blue snorks and mate them…

A: Dominant traits are visibly expressed in the offsprings, while the recessive trait are usually…

Q: In a drosophila , the allele for normal wing length is dominant over the allele for short wings. In…

A: Homozygous trait is :   q2 =360/1000 =.36 q=.6 p=1-q  =1-0.36 =0.4 p2=.16 =0.6*1000 =160.

Q: a vaiety of snapdragon has flowers that can be white, red , yellow, and pink. yellow alleles are…

A: Alleles are two forms of the same gene. For each trait, we have at least one gene and two alleles of…

Q: Why is a baby elephant considered an expensive offspring?

A: A survivorship curve is the graphical representation of the number of individual of particular…

Q: What is the contribution per allele for this trait (in inches/allele)

A: Answer: The contribution 2 inches/allele for this trait.

Q: One important example of multiple alleles is the human ABO blood type. Explain what “multiple…

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

Q: In whippets, wild-type dogs are skinny. A mutation in the myostatin gene causes dogs to become more…

A: Answer: Monohybrid cross : It is the cross between the single characteristics of two parents.…

Q: In mice, yellow fur is dominant to brown fur, and the Yellow allele is a dominant mutation.…

A: A dominant mutation is a genetic mutation that causes a different phenotype when only one copy of…

Q: The bollworm is a pest that eats and damages corn crops. During their short lifespans, Bollworms…

A: Insects have the ability to develop resistance towards the insecticides. Some of the insects are…

Q: This pedigree exhibits a maternal effect. What is the genotype of each individual?

A: Pedigree analysis is useful when identifyig any population when progeny data from several…

Q: parakeets (Melanopsittacus undulatus) come in many colors. These birds may produce zero, one, or two…

A: When you cross two homozygous individuals, all of the offspring in the F1 generation will be…

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: Feather colour in parakeets is controlled by two genes. Blue colour (B) is dominant over absence of…

A: Given that, B allele is dominant over b allele where B allele is responsible for blue color and b…

Q: heterozygous black furred shirt  whispered mouse is crossed with a homozygous white furred long…

A: Heterozygous means presence of two different alleles for a gene. For example in Aa genotype , "A" is…

Genetic Variation

Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.

Quantitative Genetics

Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.