Welcome to the Sex Linkages In Drosophila MDCAT MCQs with Answers. In this post, we have shared Sex Linkages In Drosophila Multiple Choice Questions and Answers for PMC MDCAT 2024. Each question in MDCAT Biology offers a chance to enhance your knowledge regarding Sex Linkages In Drosophila MCQs in this MDCAT Online Test.
In Drosophila, sex is determined by:
a) The number of chromosomes
b) The X and Y chromosomes
c) The Z and W chromosomes
d) The environment
In Drosophila, which sex is heterogametic?
a) Male
b) Female
c) Both
d) Neither
The gene for eye color in Drosophila is located on the:
a) X chromosome
b) Y chromosome
c) Z chromosome
d) Autosomes
Which of the following is an example of a sex-linked trait in Drosophila?
a) Wing shape
b) Eye color
c) Body size
d) Antennae length
The white-eye mutation in Drosophila is located on the:
a) Autosomes
b) X chromosome
c) Y chromosome
d) Mitochondria
In Drosophila, males are:
a) Homozygous for X-linked traits
b) Heterozygous for X-linked traits
c) Hemizygous for X-linked traits
d) Dominant for X-linked traits
A male Drosophila inherits his X chromosome from:
a) His mother
b) His father
c) Both parents
d) The environment
Which of the following crosses would produce all red-eyed female Drosophila and all white-eyed males?
a) White-eyed female × red-eyed male
b) Red-eyed female × red-eyed male
c) White-eyed male × red-eyed female
d) Red-eyed male × white-eyed female
A red-eyed female Drosophila crossed with a white-eyed male will produce:
a) All red-eyed offspring
b) All white-eyed offspring
c) Red-eyed females and white-eyed males
d) White-eyed females and red-eyed males
In Drosophila, a white-eyed male crossed with a red-eyed female will produce:
a) All white-eyed offspring
b) All red-eyed offspring
c) Red-eyed females and white-eyed males
d) All males will have white eyes
Sex-linked traits in Drosophila show different inheritance patterns because:
a) They are only found in males
b) They are located on sex chromosomes
c) They are controlled by environmental factors
d) They are autosomal traits
In a cross between a white-eyed female and a red-eyed male Drosophila, the F1 females will be:
a) White-eyed
b) Red-eyed
c) Half white-eyed and half red-eyed
d) All will have no eyes
The inheritance of white eyes in Drosophila is an example of:
a) Autosomal inheritance
b) Y-linked inheritance
c) X-linked inheritance
d) Mitochondrial inheritance
A cross between a red-eyed female Drosophila and a white-eyed male will produce:
a) All white-eyed females
b) All red-eyed females
c) Red-eyed females and white-eyed males
d) White-eyed males only
What is the chance of a white-eyed female Drosophila passing the trait to her sons?
a) 25%
b) 50%
c) 100%
d) 0%
In Drosophila, females inherit their X chromosomes from:
a) Only their mothers
b) Only their fathers
c) Both parents
d) Neither parent
Which type of cross confirms that a trait is X-linked in Drosophila?
a) Test cross
b) Reciprocal cross
c) Backcross
d) Self-cross
If a red-eyed female Drosophila is crossed with a white-eyed male, what will be the phenotype of the female offspring?
a) White-eyed
b) Red-eyed
c) Half white-eyed and half red-eyed
d) No eyes
Which type of male Drosophila has no homologous counterpart for genes located on the X chromosome?
a) Wild-type males
b) Mutant males
c) Hemizygous males
d) Heterozygous males
The discovery of sex-linked traits in Drosophila was made by:
a) Charles Darwin
b) Gregor Mendel
c) Thomas Hunt Morgan
d) Alfred Wallace
In Drosophila, a gene located on the Y chromosome will be inherited by:
a) Both sons and daughters
b) Only sons
c) Only daughters
d) None of the offspring
A male Drosophila that is hemizygous for a sex-linked recessive trait will show the trait because:
a) It has two X chromosomes
b) It has no allele to mask the trait on the Y chromosome
c) It inherits the trait from the father
d) It inherits the trait from both parents
Which of the following correctly describes the inheritance pattern of X-linked recessive traits in Drosophila?
a) They are expressed equally in males and females
b) They are expressed only in males
c) Males express the trait if they inherit one copy of the allele
d) Females always express the trait
A male Drosophila with white eyes was crossed with a red-eyed female. The male offspring had:
a) All white eyes
b) All red eyes
c) Half red and half white eyes
d) No eyes
In Drosophila, if the mother is white-eyed and the father is red-eyed, what is the probability that male offspring will have white eyes?
a) 0%
b) 25%
c) 50%
d) 100%
What is the probability that a white-eyed male Drosophila and a heterozygous red-eyed female will produce white-eyed male offspring?
a) 0%
b) 25%
c) 50%
d) 100%
If a male Drosophila with a sex-linked trait mates with a normal female, the daughters will inherit the trait if:
a) The trait is dominant
b) The trait is recessive
c) Both parents carry the trait
d) Only if the mother is a carrier
The eye color of Drosophila is a famous example of:
a) Autosomal inheritance
b) X-linked inheritance
c) Y-linked inheritance
d) Mitochondrial inheritance
When a heterozygous red-eyed female Drosophila is crossed with a white-eyed male, what percentage of male offspring will have white eyes?
a) 0%
b) 25%
c) 50%
d) 75%
The gene for eye color in Drosophila was discovered by:
a) Mendel
b) Darwin
c) Watson and Crick
d) Morgan
The discovery of sex-linked traits in Drosophila provided support for:
a) Chromosomal theory of inheritance
b) Theory of natural selection
c) Law of segregation
d) Endosymbiotic theory
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