chromosome

chromosome ________

Which is correct about the red-green colorblind in humans? A: loss of L or M cone genes on the X chromosome B: gain of S cone genes on the X chromosome C: loss of L or M cone genes on the Y chromosome D: gain of S cone genes on the Y chromosome

Sutton and Boveri developed the chromosome theory of heredity.

The exfoliative toxins, TSST-1, and the enterotoxins are all superantigens. The genes for these toxins are A: Present in all strains of Staphylococcus aureus B: Widely distributed on the staphylococcal chromosome C: On both the staphylococcal chromosome (TSST-1 and exfoliative toxins) and on plasmids (enterotoxins) D: On the staphylococcal chromosome in a pathogenicity island E: On plasmids

Principal indications for prenatal diagnosis by invasive testing: A: Previous child with a de novo chromosome abnormality B: Presence of structural chromosome abnormality in one of the parents C: Family history of an X-linked disorder D: Risk of a neural tube defect

S期的早熟凝集染色体(prematurely condensed chromosome，PCC)为（）

A complete set of genes of a given species<br/>called ( ) A: genome B: gene C: DNA D: chromosome cDNA

What is the reason that linked genes are inherited together? A: The number of genes in a cell is greater than the number of chromosomes. B: Genes align that way during metaphase 1. C: They are located on the same chromosome. D: Alleles are paired.

testis formed mainly determined by : A: SRYgene B: androgen C: X chromosome D: paramesonephric duct E: mesonephric duct