Crawfish are shelled organisms that live in shallow freshwater rivers. They can have antennae of different lengths. Two parents with medium length antennae have offspring. One of their offspring has short antennae, and one has long antennae. How did the offspring end up with traits that are different from the traits of their parents? How did the gene combinations result in these traits?

Q: Use the following passage to answer the next two questions. Ducks are aquatic birds. Their feet are…

A: Introduction:-  Ducks are aquatic birds and do have webbed feets. It is believed by biologists that…

Q: for 14. Everyone in Squidward's family has light blue skin, which is the dominant trait for body…

A: A Punnett square is an illustration of the potential genotypes of an offspring resulting from a…

Q: What are the caharacterstics features of a true breeding line?

A: Genetics is the branch of Biology dealing with the study of genes including their structure,…

Q: Everyone in Merida's family has orange hair, which is the dominant trait for hair color in her…

A: Here, dominant trait - orange hair color and recessive trait - yellow hair color.  Genotype of…

Q: How does the amount of Neanderthal DNA in modern humans vary geographically? a. Individuals of…

A: Up until around 40,000 years ago, Neanderthals who are close evolutionary related of modern humans…

Q: Which statement is true of hox genes? Group of answer choices A. they regulate development of body…

A: Hox genes - Most animal homeotic genes code transcription encodes proteins that contain a region  a…

Q: 18 19 20 QUESTION 15 During times of fertility, the rump of a female primate may change color,…

A: Primates come under order eutheria. These are also called truly placental mammals and shows unique…

Q: You are studying the evolution of a trait in two species of snakes where both species can flatten…

A: Homologous organs are defined as the organs of different animals that are having a similar structure…

Q: Describe at least 3 traits that are different between Old World Monkeys and Apes. Is Curious George…

A: The objective of the question is to identify the differences between Old World Monkeys and Apes, and…

Q: What does “descent with modification” mean? a. Populations that change quickly are likely to become…

A: "Descent with modification" is a core concept in evolutionary biology that Charles Darwin…

Q: Imagine you are a scientist observing rats in the wild. As the rats reproduce, rats born with white…

A: Adaptation through Natural selection:- Evolutionary mechanism in which individuals reproduce and…

Q: How similar are the genes of different species? Does this reflect how different or similar the…

A: The relationship between the similarity of genes in different species and the similarity of their…

Q: Why do people of European descent have a small portion of Neanderthal genes? Why don’t people of…

A: A gene is a basic unit of heredity and a sequence of nucleotides in DNA that encodes the synthesis…

Q: Organisms heterozygous for a recessive trait are often called carriers of that trait. What does that…

A: Carriers of a trait are always heterozygous, and the trait is always recessive.

Q: ccording to "The Complex Evolution of Homo sapiens", what is the significance of the L3 gene and who…

A: The question is asking about the significance of the L3 gene and the identity of the L3 woman…

Q: Why did Galton modify the quincunx? a. Because the distribution of a trait (e.g., height) in…

A: Introduction :- Physical characteristics are what traits are. Fin length, body shape, colour…

Q: Humans are heterodonts, which means they Group of answer choices have different types of teeth…

A: Human beings are highly evolved organisms that have a better thinking capacity. Humans share more…

Q: A family of mice living in a small cage had babies with white fur coloring and brown fur coloring.…

A: Grandparents' genes can affect how their grandchildren look.

Q: Did gene flow occur between Neanderthalsand humans?

A: Gene flow is a natural process of transfer of genes and alleles from one population to another. Gene…

Q: What is a mating between relatives?

A: Breeding is sexual reproduction. This process helps to produce offspring. It occurs in both animals…

Q: Based on what we know today, what is the best explanation for why the emu, ostrich, and rhea are so…

A: During the early times, Earth was not divided into continents and all the landmass was joined…

Q: If you wanted to crossbreed some Felis lybica to eventually have a domestic cat, what traits would…

A: An organism with purebred parents from two different breeds, variations, or populations is known as…

Q: How do each of the following contribute to genetic variation in offspring?  a. Crossing over b.…

A: Genetic variation is the term used to describe how the genetic make-up of organisms within a…

Animal Phylogeny

Cladistics is a method of biological classification where organisms are classified based on their ancestors and their relationship with them. It is defined as the concepts and methods for determining the branching patterns of evolution and evolutionary history. Some scientists, however, have preferred the term phylogenetic systematics or phylogenetic taxonomy to emphasize the reliance on a phylogeny for classification. It is the most common and accepted method for classifying organisms.