Inheritance test 1

The question pertains to a foundational concept in genetics, specifically the formation of gametes through the process of meiosis.

The genotype RrYy will yield four types of gametes, each with a unique combination of alleles due to independent assortment.

The correct combinations are RY, Ry, rY, ry, hence the answer is option A.

Consequently, the correct answer is A) RY, Ry, rY, ry.

The question pertains to the study of genetics, specifically gene expression in the fruit fly Drosophila.

The cinnabar gene is responsible for causing a specific color in the eyes of Drosophila.

Among the options given, "Brick red eye color" is the correct one. Hence, the answer is C, "Brick red eye color".

This question involves genetic concepts, specifically Mendel's laws.

Deviation from these laws can occur in several ways, including through autosomal linkage of genes.

Therefore, the correct answer is A, "Autosomal linkage of gene".

This question pertains to genetics. A 3:1 phenotypic ratio is indicative of a particular genetic pattern.

In this case, a 3:1 phenotypic ratio proves "Segregation", as per Mendel's law.

Hence, the correct answer is B, "Segregation".

The question pertains to human blood groups and their compatibility during transfusions.

Blood type O- is often referred to as the 'universal donor' as it lacks A, B, and Rh antigens, allowing it to be donated to individuals of any blood type.

Therefore, the correct answer is C, "O-".

This question pertains to the study of genetics, specifically the concept of alleles.

Alleles are different forms of a gene that occur at the same place on a chromosome and are responsible for variation in genetic traits.

The correct definition, therefore, is A) A pair of genes governing a specific character such as tallness or dwarfness.

This question pertains to genetic diseases and their association with specific chromosomes.

While Sickle cell anemia, Leukemia, and Drepanocytosis have their associated genes on chromosome 11, Diabetes mellitus does not.

The scenario involves an emergency situation where a patient needs a blood transfusion, but their blood type is unknown.

In such cases, the 'universal donor' blood type O is typically safe to use because it lacks A, B, and Rh antigens.

Therefore, the doctor friend's blood group must be O, making the correct answer C, "Blood group O".

This question involves the principles of genetics, specifically crossbreeding and the resulting phenotypes.

Given the genetic make-up of the two animals, two distinct phenotypes can be expected from the cross.

Therefore, the correct answer is B, "2".

This question explores the likelihood of a specific genetic trait appearing in the offspring of a cross.

Given the genetic information provided, 25% of the offspring from the cross will be red-eyed females.

Consequently, the correct answer is A, "25%".

This question examines the terminology used in genetics, particularly regarding traits controlled by genes on autosomes.

Autosomal traits are those governed by genes found on autosomes, non-sex chromosomes, distinguishing them from sex-linked traits.

Thus, the correct answer is D, "Autosomal traits".

This question pertains to the purpose of a test cross in genetic studies.

A test cross is primarily used to determine the genotype, or genetic makeup, of an organism, in this case, a plant.

Therefore, the correct answer is A, "To ascertain the genetic makeup of a plant".

This question investigates the relationship between the outcomes of a test cross and the type of gene linkage.

If a test cross results in more parental offspring and fewer recombinants, it implies that the genes in question are closely linked, denoting either incomplete or tight linkage.

The correct response, therefore, is D, "Either B or C".

The question centers on predicting the likelihood of a specific genetic trait appearing in the offspring of a particular cross.

Given the genetic combinations of the parents, 25% of the offspring are expected to have white eyes.

Therefore, the correct response is C, "25%".

The question pertains to the principles of genetics, more specifically the number of unique genotypes that result from a dihybrid cross.

For the given scenario, we can anticipate 9 distinct genotypes among the 16 offspring plants.

As a result, the correct answer is B, "9".

The question explores the basic principles of genetics, specifically focusing on the fundamental unit of heredity.

Genes carry the information that determines traits, making them the primary unit of inheritance.

This leads us to the correct answer, C, "Gene".

The question delves into the understanding of gene linkage in genetic crosses.

Genes that are located on the same chromosome and tend to be inherited together are referred to as "Linked genes."

Therefore, the correct response is C, "Linked genes".

This question pertains to an understanding of the genetics of haemophilia.

The allele for haemophilia is recessive and is carried on the X chromosome.

Consequently, the correct answer is A, "X chromosome".

This question involves calculating the likelihood of a specific phenotype in the offspring based on the parents' genotypes.

Given the parents' blood types in this scenario (AB and O), the probability of them having a type O child is zero.

Hence, the correct answer is D, "0%".

The question focuses on the concept of genetic inheritance as illustrated by the ABO blood group system.

The ABO system is characterized by multiple alleles, three to be exact (A, B, and O), demonstrating the principle of multiple allelism.

As a result, the correct answer is A, "Multiple allelism".

This question pertains to the concept of genetic mapping and the terms associated with it.

The terminology for an ordered list of genetic loci along a particular chromosome is a "genetic map" or a "linkage map".

This question explores the principles of Mendelian genetics, specifically focusing on monohybrid crosses and their resulting genotypic ratios.

In the second generation (F2) of a monohybrid cross, the expected genotypic ratio is 1:2:1.

Consequently, the correct answer is C, "1:2:1".

The question inquires about the genetic ratios found in the second filial (F2) generation of a dihybrid cross.

Specifically, it asks for the proportion of plants that are homozygous for both dominant characters.

With this in mind, the correct answer is A, "1/16".

The question centers on understanding the various types of genetic crosses.

It specifically focuses on a cross involving F1 hybrids and a parent with recessive traits, where both phenotypes appear equally.

Based on this, the correct answer is B, "Test cross".

This question seeks to test your understanding of genetic dominance.

In this situation, the allele for yellow seeds, which appears in all F1 plants, is dominant over the allele for green seeds.

Therefore, the correct answer is B, "Dominant".

This question evaluates your understanding of sex-linked characteristics and how they are inherited.

Here, the focus lies on a cross between a heterozygous red-eyed female and a white-eyed male, with the percentage of white-eyed male offspring being sought.

Accordingly, the correct answer is C, "50%".

The question assesses your knowledge about the pioneers in the field of genetics specifically related to genetic mapping.

It is asking about the scientist responsible for the construction of the genetic map.

Hence, the correct answer is B, "Alfred H. Sturtevant".

The question relates to the outcomes of a dihybrid cross and asks what a 3:1 phenotypic ratio in the F2 generation might indicate.

The phenotypes' proportion suggests that the alleles have segregated independently during meiosis, following Mendel's law of independent assortment.

Thus, the correct answer is A, "They underwent independent assortment".

The question tests your knowledge of key contributors to genetics, specifically in the context of genetic mapping.

The query is about the introduction of the term "map unit" or "centimorgans (cM)".

Consequently, the correct answer is A, "T.H Morgan".

This question is about your understanding of inheritance patterns, particularly in the context of sex-linked diseases like hemophilia.

It specifically asks about the probability of a child inheriting hemophilia when the father has the disease, and the mother is a carrier.

Therefore, the correct answer is B, "50%".

The question explores the concept of how genotypes interact with the environment in genetics.

The question is asking what is produced from this interaction.

The correct answer is D, "All of them", as genotypes interacting with the environment can produce characters, traits, and phenotype.

The question assesses your understanding of the ABO blood grouping system in genetics.

It asks why the system is named 'ABO' instead of 'ABC', with the meaning of 'O' being the subject of interest.

Therefore, the correct answer is C, "Absence of A and B antigens on RBCs".

The question tests your knowledge about human chromosomes and their genetic content.

It asks for the identification of a true statement among the options.

Accordingly, the correct answer is C, "They carry many genes", since human chromosomes are known to carry a multitude of genes.

The question pertains to holandric inheritance, a specific inheritance pattern in humans.

It asks you to identify an example of this inheritance pattern from the provided options.

Therefore, the correct answer is B, "Hairy ears", which is an example of holandric inheritance.

This question seeks to test your understanding of how the ABO blood group system exemplifies certain genetic concepts.

The task is to determine which concepts in genetics the ABO blood group system represents.

Consequently, the correct answer is D, "Multiple alleles and co-dominance".

The question probes your awareness of different types of crosses in genetics.

The query describes a specific situation where all the F2 offspring show the dominant character when F1 offspring are crossed with the dominant parent.

Hence, the correct answer is B, "Back cross".

This question is about the definition of 'genotype' in genetics.

You're asked to identify what the term 'genotype' specifically refers to.

The correct answer is D, "The genetic makeup of a single individual", as a genotype represents the set of genes in an organism's DNA responsible for a particular trait.

The question examines your knowledge on blood typing in genetics.

It requests to identify the factors used to determine one's blood type.

Consequently, the correct answer is D, "All of the above", as all three factors (ABO antigen locus, Rh factors, and the Lewis system) contribute to determining a human blood type.

This question explores your understanding of gene locations on chromosomes.

It asks you to identify the chromosome number that carries the gene for drepanocytosis.

As such, the correct answer is B, "11", as the gene for drepanocytosis is indeed located on chromosome 11.