Podcast
Questions and Answers
Which of the following accurately describes the relationship between genes and alleles?
Which of the following accurately describes the relationship between genes and alleles?
- Alleles are the physical expressions of genes, while genes are the underlying genetic combinations.
- Alleles are the traits passed from parent to offspring, while genes control meiosis.
- Genes are segments of DNA that control a trait, while alleles are the different forms a gene can take. (correct)
- Genes are the observable characteristics, while alleles determine heredity.
A plant breeder wants to create a new variety of flower with a unique color combination. Which of the following techniques would be most effective?
A plant breeder wants to create a new variety of flower with a unique color combination. Which of the following techniques would be most effective?
- Cloning to replicate existing plants.
- Gene therapy to directly alter the plant's DNA.
- Hybridization to combine traits from different plants. (correct)
- Inbreeding to increase genetic uniformity.
In a certain species of bird, feather color is controlled by a single gene with two alleles: 'B' for black feathers (dominant) and 'b' for white feathers (recessive). If two heterozygous birds (Bb) are crossed, what is the probability of their offspring having white feathers?
In a certain species of bird, feather color is controlled by a single gene with two alleles: 'B' for black feathers (dominant) and 'b' for white feathers (recessive). If two heterozygous birds (Bb) are crossed, what is the probability of their offspring having white feathers?
- 50%
- 0%
- 75%
- 25% (correct)
A researcher is studying a family in which a particular genetic disorder is present. To trace the inheritance pattern of the disorder, what tool would be most helpful?
A researcher is studying a family in which a particular genetic disorder is present. To trace the inheritance pattern of the disorder, what tool would be most helpful?
In cattle, the alleles for red hair (R) and white hair (W) are codominant. Cattle that are heterozygous (RW) have roan colored hair (a mix of red and white hairs). If a roan bull is mated with a white cow, what is the expected ratio of hair colors in their offspring?
In cattle, the alleles for red hair (R) and white hair (W) are codominant. Cattle that are heterozygous (RW) have roan colored hair (a mix of red and white hairs). If a roan bull is mated with a white cow, what is the expected ratio of hair colors in their offspring?
Flashcards
Heredity
Heredity
The passing of traits from parents to offspring.
DNA
DNA
The instructional code, found in the nucleus, that directs cell activities.
Alleles
Alleles
Different forms of a gene, represented by letters.
Meiosis
Meiosis
Signup and view all the flashcards
Phenotype
Phenotype
Signup and view all the flashcards
Study Notes
- Heredity involves traits passed from parent to offspring.
- Nucleus contains DNA and the nuclear membrane, which controls all cell activities.
- DNA is the instructional code, located in the nucleus, and instructs cells what to do.
- Genes are the factors that controls a trait exhibited.
- Alleles are the letters representing the different forms of a gene.
- Meiosis produces 4 sex cells (sperm or egg) used to pass traits from parents to offspring.
- Mitosis, in cell reproduction, one body cell becomes 2.
- A dominant trait overshadows and is expressed.
- A recessive trait that hides in the background and can only be expressed in homozygous form.
- Genotype is the combination of alleles (letters).
- Phenotype is the physical appearance of a trait.
- Heterozygous/Hybrid consists of two different alleles/letters denoted as (Dd) for one the trait
- Homozygous/Purebred consists of 2 alleles/letters that are the same for one trait.
- Genetic Engineering involves altering DNA to get desired traits.
- Selective Breeding selects organisms with desired traits to breed and pass on traits.
- Gene Therapy involves adding/deleting genes to correct or get rid of disorders.
- Hybridization involves crossing 2 organisms resulting in an organism with desired traits.
- Cloning creates a new organism with the same genes as the original.
- Inbreeding occurs when two organisms with the same characteristics mate.
- Pedigree is a way of tracing a trait through a family tree.
- Codominance is when dominant and recessive traits are combined in heterozygotes, with both traits expressed at the same time.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Explore heredity, DNA's role as the instructional code, and genes as trait controllers. Learn about meiosis, mitosis, and the impact of dominant and recessive traits, as well as genetic engineering. Understand genotype, phenotype, and allele combinations.
