Ch 13

X-linked recessive traits in humans (or in Drosophila) are observed ________.

The genotype XXY corresponds to

one X chromosome in each cell inactivates by tightly condensing into a quiescent (dormant) structure is called

the chromosomal theory of inheritance states

For an X-linked trait, it is the contribution of __________ that determines whether a son will display the trait.

Which of the following codes describes position 12 on the long arm of chromosome 13?

answer

Advances in ___ and staining techniques allowed the visualization of chromosomes that proved Mendel’s theory

Lejeune's syndrome is a disorder from the __ of chromosome 5

A karyotype is the number and appearance of chromosomes, includes their length, banding pattern, and centromere position

the Chromosomal Theory of Inheritance, which states that chromosomes carry the unit of heredity (genes)

By definition, a pericentric inversion includes the ________.

In agriculture, polyploid crops (like coffee, strawberries, or bananas) tend to produce ________.

An extra copy of chromosome 21 also called trisomy results in

Which recombination frequency corresponds to independent assortment and the absence of linkage?

a progeny resulting from homologous recombination that exhibits a different allele combination compared with its parents

T.H. Morgan discovered X and Y chromosomes inheritance based on sex with what?

What is the probability that a human male will inherit an X-linked recessive allele from his father?

The first suggestion that chromosomes may physically exchange segments came from the microscopic identification of ____.

Abnormalities in the # of X chromosomes have milder phenotypic effects than the same abnormalities in autosomes because

during meiosis, homologous chromosomes sometimes "stick together" and do not separate properly. This is called

A man who carries an allele of an X-linked gene will pass it on to _____

Which recombination frequency corresponds to perfect linkage and violates the law of independent assortment?