Exploring Genetics and Heredity

What is a dominant trait?

• A dominant trait is only expressed when two dominant alleles are present.

• A dominant trait is a genetic characteristic that cannot be inherited.

• A dominant trait is a characteristic that is always recessive.

• A dominant trait is a genetic characteristic that is expressed when at least one dominant allele is present.

What is a recessive trait?

• A recessive trait is always dominant over other traits.

• A recessive trait is a genetic trait that is only expressed when two recessive alleles are present.

• A recessive trait is expressed with just one allele present.

• A recessive trait can be seen in the phenotype regardless of allele combination.

Define genotype.

• The genotype is the process of evolution in species.

• The genotype is the genetic makeup of an organism.

• The genotype refers to the environment in which an organism lives.

• The genotype is the physical appearance of an organism.

Define phenotype.

• Phenotype refers to the genetic makeup of an organism.

• Phenotype is the set of observable characteristics of an organism.

• Phenotype is the process of evolution in species.

• Phenotype is the study of ecosystems and their interactions.

What were the main findings of Mendel's experiments?

• Mendel proved that traits are inherited randomly without any patterns.

• Mendel discovered the laws of inheritance, including dominant and recessive traits, and formulated the Law of Segregation and the Law of Independent Assortment.

• Mendel's experiments focused solely on animal genetics and not plants.

• Mendel discovered that all traits are equally dominant in inheritance.

How do you set up a Punnett square?

• Use colors to represent different alleles in the squares.

• Write one parent's alleles across the top and the other parent's alleles down the side, then fill in the squares.

• List both parents' alleles in a single row.

• Draw a circle around the alleles before filling in the squares.

What does a Punnett square show?

• A Punnett square shows the possible genetic combinations of offspring from two parents.

• A Punnett square shows the physical traits of parents.

• A Punnett square predicts the weather patterns.

• A Punnett square illustrates the food chain in an ecosystem.

What is genetic variation?

• Genetic variation is the study of how genes are expressed in different environments.

• Genetic variation refers to the identical genetic makeup of all individuals in a population.

• Genetic variation is the process of cloning genes in a laboratory.

• Genetic variation is the diversity in gene frequencies among individuals in a population.

Name one factor that contributes to genetic variation.

• Natural selection

• Mutation

• Environmental factors

• Genetic drift

What is the difference between homozygous and heterozygous?

• Homozygous has different alleles; heterozygous has identical alleles.

• Homozygous is always dominant; heterozygous is always recessive.

• Homozygous refers to a single allele; heterozygous refers to multiple alleles.

• Homozygous has identical alleles; heterozygous has different alleles.