Unit 5- Heredity and Reproduction

What does the allele combination 'Aa' represent?

• A homozygous dominant genotype, where both alleles are dominant (AA).

• A homozygous recessive genotype, where both alleles are recessive (aa).

• A heterozygous genotype, where one allele is dominant (A) and the other is recessive (a).

• An allele combination that has no effect on phenotype.

What is a Punnett Square?

• A tool used in genetics to predict the probability of certain traits in offspring.

• A method for measuring the height of plants.

• A chart used to track animal populations in the wild.

• A diagram for illustrating food chains in ecosystems.

What is genetic variation?

• Differences in DNA among individuals, which can lead to different traits.

• The process by which organisms adapt to their environment.

• The study of heredity and the variation of inherited characteristics.

• A method of genetic engineering used to create new species.

What is a recessive allele?

• An allele that expresses its trait only when two copies are present.

• An allele that always expresses its trait regardless of the other allele.

• An allele that can mask the expression of another allele.

• An allele that is only found on the X chromosome.

What is the difference between sexual and asexual reproduction?

• Sexual reproduction involves the fusion of gametes from two parents, while asexual reproduction does not.

• Asexual reproduction requires two parents, while sexual reproduction can occur with one.

• Sexual reproduction produces genetically identical offspring, while asexual reproduction produces diverse offspring.

• Asexual reproduction involves the fusion of gametes, while sexual reproduction does not.

What is the role of chromosomes in heredity?

• Chromosomes carry genes that determine traits.

• Chromosomes are responsible for producing energy in cells.

• Chromosomes help in the digestion of food.

• Chromosomes are involved in the formation of blood cells.

What is a phenotype?

• The genetic makeup of an organism.

• The observable traits of an organism, determined by its genotype.

• The process of natural selection acting on a population.

• The environment's influence on an organism's development.

What is the main advantage of using scientific models in biology?

• They provide a detailed description of every biological process.

• They simplify complex systems to improve understanding.

• They eliminate the need for experimentation.

• They are always accurate and reliable.

What is the significance of genetic diversity?

• It decreases the chances of survival for a species.

• It increases the chances of survival for a species in changing environments.

• It has no impact on species survival.

• It leads to more genetic mutations in a population.

What is asexual reproduction?

• A type of reproduction that results in offspring that are genetically identical to the parent.

• A type of reproduction that involves the fusion of male and female gametes.

• A type of reproduction that occurs only in plants.

• A type of reproduction that requires two parents.