4. The roof rat (Rattus rattus) and the Norway rat (Rattus norvegicus) are unable to interbreed because their Fi progeny die during embryogenesis. This type of reproductive isolation is best described as: A. a post-zygotic barrier known as behavioral F, inferiority B. a post-zygotic barrier known as F2 hybrid breakdown C. a post-zygotic barrier known as ecological F, inferiority D. a post-zygotic barrier known as F, hybrid sterility E. a post-zygotic barrier known as F, hybrid inviability

Q: D. WHA 12. A male mouse heterozygous for both fur and eye colour mated with a female mouse…

A: The condition where to non-identical genes are present in an individual for a particular character…

Q: 1. List three places outside of Africa where sickle-cell anemia is fairly common in the indigenous…

A: A population is described as a group of individuals of the same species living and interbreeding…

Q: "Differential reproductive success of individual organisms":

A:

Q: A homologous trait:

A: Answer -  Homologous traits are any characteristics present in two different animals which share the…

Q: 1. Which of these reproductive barriers is also responsible for sympatric speciation processes? A.…

A: In allopatric speciation, groups become reproductively isolated and diverge due to a geographical…

Q: 2. Determine the phenotype for each genotype using the information provided. (3) A loud bark is…

A: Phenotype:It is the physical properties of an organism which can be observed. The examples include…

Q: Which among the following is NOT a principle of natural selection?  a. The genes produced are a…

A: According to the theory of natural selection given by Darwin it is said that nature selects the best…

Q: The Grants have studied finches on the Galapagos Islabds for 40+ years. During times of drought…

A: In September, 1835, Charles Darwin stepped on to the Galapagos Islands. This led to the stepping…

Q: When we take, say, 100 individuals of a species of beetle from the wild and place them in a new…

A: Each environment that an organism inhabits is distinct from the others. Its natural habitat is…

Q: 22 38 38 38 la 1b 2a 2b 3a 3b 4a 4b 5a 5b Solitary bat Colonial bat. >35-cm wingspan 35-cm wingspan.…

A: A dichotomous key is defined as an identification technique that repeatedly divides groups of…

Q: A very large population of randomly- mating laboratory mice contains 35% white mice. White coloring…

A: White recessive genotype (aa) = 35% or 0.35Dominant genotype (AA) =  ?

Q: Given that long wings (L) are dominant to short wings (I) , predict the phenotypic ratio in a cross…

A: This is a case of monohybrid cross because single trait is involved in this case.

Q: 2. Jean-Baptiste Lamarck's explanation for the evolution of long-necked giraffes from shorter-…

A: Evolution is defined as the change in trait of an individual over a period of time.

Q: A small group of turtles float on a log to an island and establish a new population there.  How do…

A: Disclaimer: Since you have asked multiple questions, we will solve the first question for you. If…

Q: A. a population of lizards may be brown or red. The temperature of the eggs determines the color of…

A: Natural selection is the non random process that drives evolution.

Q: Most of the genetic diversity in a population of animals comes from which of the following?  A.…

A: The correct answer is:B. Independent assortment plus random fertilizationIndependent assortment:…

Q: 1. Captive breeding programs can reestablish the populations of threatened species in the wild, but…

A: Captive breeding is the process of maintaining plants or animals in controlled environments, such as…

Q: New alleles are born into a population in.... O a. Linkage equilibrium via natural selection O b.…

A: Introduction:- Mutations are the events that occurs in the genetic material of an individual…

Q: A Punnett square without the genotypes of the parents is shown below. What are the…

A: Bb,Bb are the genotypes of the parents.

Q: People with two copies of the sickle cell gene are often quite ill with sickle cell anemia, while…

A: Sickle cell disease is a hereditary disease which affects the hemoglobin molecules.It was first…

Q: Why is the Hardy Weinberg law of equilibrium important to a study of evolutionary processes?  a. it…

A: There are some important points about Hardy Weinberg law : It is a rule that relates allelic and…

Q: Members of two separate species mate and produce hybrid offspring that fail to thrive in the…

A: In biology, a hybrid is the outcome of sexual reproduction mixing the traits of different organisms…

Q: Allopatric but not sympatric speciation requires O A. Reproductive isolation B. Geographic isolation…

A: The process of formation of new species is known as speciation. There are different types of…

Q: 5. The wood frog (Rana sylvaticus) is unable to breed successfully with the leopard frog (Rana…

A: Introduction :- F1 hybrids are formed in the F1 generation or first filial generation , when male…

Q: Why does raising fruit flies on different food sources potentially lead to speciation? 7. What…

A: The process of speciation, or the formation of new species, is a fundamental concept in evolutionary…

Q: 6. Consider that people with blue eyes must have two alleles for blue eyes since blue eye color is a…

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

Q: Sexual selection can be driven by ________.   A. ecological factors favoring r-selected genotypes…

A: There are mainly two types of interaction:- 1) Positive interaction 2) Negative interaction Among…

Q: 16. Allele BB is... 17. Allele Dd is... 18. Allele tt is... a. Homozygous Recessive b. Heterozygous…

A: # According to our guideline we can answer only the first question and three subparts of the first…

Q: 1. Define each of these vocabulary words: a. True-breeding: b. Filial: C. Allele: d. Dominant: e.…

A: Genetics is the branch of biology-related to genes, heredity, genetic variation. Inheritance…

Q: paedomorphosis,

A: Pedomorphosis is an alternative process to metamorphosis in which adults retain larval traits at…

Q: Lumber lordosis or the inward 's-shapes' curve of the human spine, can be described as a ___ trait:…

A: Evolution in biology can be mostly simply described as descent with modifications, which…

Q: 20. Savanna giraffes are thought to have evolved from okapi-like ancestors as the climate became…

A: Cladogenesis is splitting of one parent into two different species. Anagenesis is formation of new…

Q: In the course of human evolution, we can see in the fossil record a tendency towards increasingly…

A: Selection is the result of all combined forces that cause survival difference as well as…

Q: The Casparian strip is a bandlike region of primary wall containing and ; found in endodermal cells.

A: Casparian Strip It is a band of cell wall material deposited in the radial and transverse walls of…

Q: the savannahs of the Amazon different species of the genus Ipomoea are pollinated by either…

A: Postzygotic isolation occurs when the mating between the members of two different species produces a…

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.