Mendelian Genetics Cross - Heterozygote and Homozygous Recessive

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According to the passage, which of the following is an example of a polymorphism in humans?

Huntington's disease

Dark versus blonde hair (correct)

Sickle cell anemia

Cystic fibrosis

What is the relationship between a gene and a polymorphism, according to the passage?

A polymorphism is a mutation in a gene that is passed on to offspring and coexists with the original gene. (correct)

A polymorphism is a single gene that controls multiple traits.

A polymorphism is a set of genes that control a single trait.

A polymorphism is a chromosomal abnormality that leads to sex-linked inheritance.

According to the passage, what is the primary function of the Y chromosome in humans?

The Y chromosome contains genes involved in female sexual function.

The Y chromosome contains genes involved in male sexual function, such as the SRY gene. (correct)

The Y chromosome contains genes that are involved in the production of both sperm and eggs.

The Y chromosome contains genes that determine eye color and hair color.

What is the relationship between the X chromosome and sex-linked inheritance in humans, according to the passage?

The X chromosome contains many hundreds of genes, most of which are not involved in sexual function and have no counterparts on the Y chromosome. Signup and view all the answers

According to the passage, which of the following is an example of a sex-linked trait in humans?

Color blindness Signup and view all the answers

What is the relationship between genes and traits, according to the passage?

Both (a) and (b) are correct. Signup and view all the answers

According to Mendel's Law of Segregation, what happens to the two members of a gene pair during gamete formation?

The two members of the gene pair segregate from each other, with one member going into each gamete. Signup and view all the answers

What is the expected phenotypic ratio in the F2 generation of a monohybrid cross where the parents are heterozygous for the trait?

1:2:1 Signup and view all the answers

What is the relationship between an organism's genotype and phenotype?

Genotype determines phenotype, but the environment can also influence the phenotype. Signup and view all the answers

What is the expected phenotypic ratio in the F2 generation of a dihybrid cross where the parents are heterozygous for both traits?

9:3:3:1 Signup and view all the answers

According to Mendel's Law of Independent Assortment, how are the alleles of different genes inherited?

The alleles of different genes are inherited independently of each other. Signup and view all the answers

What is the purpose of meiosis in the formation of gametes?

To randomly distribute the alleles of a gene pair into the gametes. Signup and view all the answers

In a cross between a heterozygous individual (Aa) and a homozygous recessive individual (aa), what is the expected phenotypic ratio in the offspring?

1 dominant : 1 recessive Signup and view all the answers

If a dihybrid cross is performed between two individuals with genotypes AaBb and aabb, what is the probability of obtaining an offspring with the genotype AaBb?

1/4 Signup and view all the answers

In a cross between two heterozygous individuals (AaBb), what is the probability of obtaining an offspring with the genotype AAbb?

1/8 Signup and view all the answers

If an individual with the genotype AaBbCc is self-pollinated, what is the probability of obtaining an offspring with the genotype AABbcc?

1/32 Signup and view all the answers

In a cross between two individuals with genotypes AaBbCc and AaBbcc, what is the expected phenotypic ratio for the trait controlled by the C/c alleles?

1:1 Signup and view all the answers

If an individual with the genotype AaBbCc is crossed with an individual with the genotype aabbcc, what is the probability of obtaining an offspring with the genotype AaBbCc?

1/16 Signup and view all the answers