During which phase of meiosis do homologous chromosomes align as tetrads in the middle of the spindle?

a. prophase 1

b. prophase 2

c. metaphase 1

d. metaphase 2

A hypothetical flowering plant produces blue, light blue, and white flowers. To determine the inheritance pattern, the following crosses were conducted with the results indicated: blue x blue * all blue white x white all white blue x white * all

Fossil fuels such as coal, oil, and natural gas supply much of the world's energy. However, these fuels have a tremendous negative effect on the environment. Which of the following would be the best strategy to alleviate this problem? A.

How does the electron transport chain transfer light energy in photosynthesis

What is steroid hormones

They asked "what is the biological name for black jack?

Which effect is most likely caused by nondisjunction during meiosis? A. an extra chromosome B. an increase in nuclei C. increased survival benefits from traits D. only two types of nitrogenous bases

A segment of dna that codes for rna and a protein is a

For older adults and previously inactive individuals, exercise intensity should fall closer to what percentage of the maximal heart rate?

Colleen has been advised by her physician to avoid taking high-dose supplements of certain vitamins because they can accumulate to toxic levels in her body. which vitamins?

In 1865, a biologist, St. George Jackson Mivart, constructed an evolutionary tree of existing primate species with many branches based on analysis of spinal columns. But to his dismay, another tree based on limb comparison was quite different.