18 Questions
According to the passage, which of the following is an example of a polymorphism in humans?
Dark versus blonde hair
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.
According to the passage, what is the primary function of the Y chromosome in humans?
The Y chromosome contains genes involved in male sexual function, such as the SRY gene.
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.
According to the passage, which of the following is an example of a sex-linked trait in humans?
Color blindness
What is the relationship between genes and traits, according to the passage?
Both (a) and (b) are correct.
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.
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
What is the relationship between an organism's genotype and phenotype?
Genotype determines phenotype, but the environment can also influence the phenotype.
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
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.
What is the purpose of meiosis in the formation of gametes?
To randomly distribute the alleles of a gene pair into the gametes.
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
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
In a cross between two heterozygous individuals (AaBb), what is the probability of obtaining an offspring with the genotype AAbb?
1/8
If an individual with the genotype AaBbCc is self-pollinated, what is the probability of obtaining an offspring with the genotype AABbcc?
1/32
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
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
Learn about Mendel's Law of Segregation through a cross between a presumed heterozygote and a presumed homozygous recessive, resulting in a 1:1 progeny ratio. Understand how dominant and recessive alleles interact to determine phenotypes.
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