How many sex chromosomes are there in a normal human karyotype?

A. 4

B. You only need one sex chromosome, and that determines if you are a male or female.

C. 2

I'm confused ...

Which of the following is NOT an example of physical evidence? testimony of the neighbor next door a knife near the accident scene fingerprints on the window footprints in the grass near the victim

In the summer, laboratories can become hot and stuffy. Is it appropriate to wear flip-flops or sandals to lab to keep cooler?

What is the lithosphere composed of? Question 3 options: 1. inner core and outer core 2. mantle 3. crust and the outer core 4. crust and the upper mantle

Which of these are included in the immune response? Select 3 correct answers.

Explain the reasons for changes in how organisms are classified.

Polymers are made of individual subunits called

in your own words, explain how a person may taste the bitterness of PTC by using the following vocabulary words in your explanation, trait, gene, genotype, phenotype, and alleles.

What air pollutant that is released due yo human activity? A) carbon dioxide B) nitrogen dioxide C) toxic dioxide D) all of these are air pollutants caused by humans

A group of eye disorders resulting from increased intraocular pressure is

Population i stars are found in what area of the milky way? a. spiral arms b. central bulge c. halo d. globular clusters