For an X-linked recessive trait, human females must be ___ for the recessive allele in order to express the trait.
1.hemizygous
2.homozygous
3.heterozygous 4.heterogametic
Humans with Turner syndrome are
1.polyploid. 2.aneuploid.
3.heteroploid.
4. Haploid.
Inactivation of an X chromosome in human females results from the process of ____________ and in the production of a _____________.
1.lyonization; Barr body
2.
inactivation; Y chromosome 3.dosage compensation; genetic mosaic
4. None of the listed responses is correct.
In Drosophila, females are the ___ sex.
heterogeneous
homogametic allogametic
In humans, gender is determined by the presence or absence of which chromosome?
X chromosome
Y chromosome
chromosome 22
Cells obtained from a Triplo-X woman would contain ________ Barr bodies.
1
4
2
3
The chromosome theory of inheritance states that
- alleles of a gene segregate during cell division.
chromosomes consist of DNA.
chromosomes replicate before cell division.
different chromosomes assort independently of one another. genes are located on chromosomes.
In an organism with 16 chromosomes per cell, how many DNA molecules are present in a cell undergoing anaphase of mitosis?
824
64
16
Individuals with Turner syndrome are
1. aneuploid.
2.monoploid.
3.polyploid.
4.haploid.
5.euploid.
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