43 Questions
What is a species defined as in biological terms?
A group of organisms that can interbreed and produce fertile offspring
What do populations refer to in biological terms?
Groups of individuals belonging to the same species living in a particular area
How does meiosis contribute to genetic variation?
Through Crossing Over and Random Arrangement of Chromosomes
What happens during Crossing Over in meiosis?
Homologous chromosomes exchange genetic material
What is the purpose of independent assortment in meiosis?
To ensure each gamete contains a different set of genes from both parents
What are mutations in biological terms?
Changes in the DNA sequence of an organism
Why is variation among individuals of the same species important?
For the survival and evolution of the species
Which process combines the genetic material from two different gametes?
Random Fertilization
What type of variation occurs when a characteristic shows a range of phenotypes between two extremes?
Continuous Variation
How does non-random mating, such as inbreeding, affect genetic diversity in a population?
Decreases genetic diversity
Which mechanism provides the raw material for evolution by creating genetic variations?
Random Fertilization
Blood groups in humans are an example of which type of variation?
Discontinuous Variation
What is the main purpose of maintaining genetic diversity in species according to the text?
For species survival
Which factor contributes to continuous variation in characteristics like height in humans?
Polygenic Inheritance
What process helps scientists comprehend how species adapt to their environments and how new species arise?
Understanding sources and types of variation
What is the primary difference between a species and a population?
Populations are confined to a specific geographical area while species are not.
Which process during meiosis leads to the creation of new combinations of genes?
Crossing Over
How do mutations contribute to genetic variation in a species?
By changing the DNA sequence
Which biological process ensures that each gamete contains a unique combination of genes from both parents?
Independent Assortment
Why is variation among individuals of the same species considered vital for survival and evolution?
To promote genetic diversity
Which mechanism in meiosis contributes most significantly to genetic variation?
Crossing Over
Why is meiosis considered crucial for producing genetic diversity?
By creating unique gametes through processes like Crossing Over and Independent Assortment
What effect does non-random mating, such as inbreeding, have on genetic diversity in a population?
Decreases genetic diversity
Which type of variation refers to characteristics that fall into distinct categories with no intermediate phenotypes?
Discontinuous Variation
How does random fertilization contribute to genetic diversity?
By combining genetic material from two different gametes
Which process is essential for natural selection and evolution by providing the raw material for genetic variations?
Mutation
What type of variation usually involves influences from multiple genes (polygenic inheritance) and environmental factors?
Polygenic Variation
What impact does inbreeding have on genetic disorders within a population?
Increases the incidence of genetic disorders
What is the significance of meiosis in producing genetic diversity?
Ensuring each gamete contains a unique combination of genes
How does crossing over during meiosis contribute to genetic variation?
Creates new combinations of genes
Why are mutations considered important sources of genetic variation?
Mutations contribute to changes in the DNA sequence
What is the role of independent assortment in meiosis?
Randomly arranging chromosomes to create unique gene combinations
How does genetic diversity contribute to the survival and evolution of a species?
Provides raw material for natural selection and adaptation
What is the impact of variation among individuals of the same species?
Contributes to the diversity of life forms observed
Which process ensures that genetic material from both parents contributes to each gamete?
Random fertilization of gametes
What is the role of random mating in a population?
Increases genetic diversity
Which process can result in new phenotypes within a population?
Random fertilization
How does inbreeding affect genetic disorders within a population?
Increases genetic disorders
Which variation type occurs when a characteristic does not have intermediate phenotypes?
Discontinuous variation
What is the significance of mutations in a species?
Confer advantages leading to new phenotypes
Why is understanding the sources and types of variation important in conservation biology?
To understand species adaptation
What type of variation is typically influenced by multiple genes and environmental factors?
Polygenic inheritance
In terms of natural selection, what role does genetic diversity play within populations?
Provides raw material for selection
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
