Respuesta :
Answer: (2) Black bears have 74 chromosomes and 37 haploid chromosomes. (3) The bears become s3xually mature anywhere from 3-7 years. (4) There are two types of reproductive barriers: Prezygotic and Postzygotic.
Explanation:
37 chromosomes are in the black bears sex cells bears,Sex cells only contain half the number of chromosomes found in the body cells.
What is meant by Chromosomes?
- Chromosomes are the thread-like structure present in the nucleus of plant and animal cells. Chromosomes are the vehicle that carries DNA (the genetic material of the cell) wrapped around by the histone proteins.
- A chromosome is a DNA molecule that consists of a part or all of the genetic material of an organism. The chromosome is present in the nucleus of each cell, and it is packaged into thread-like structures.
- Structurally, each chromosome is composed of DNA that is tightly coiled around special proteins called histones.
- The main function of chromosomes is to carry the genetic material from one generation to another.
The body cell of an American black bear contains 74 chromosomes, then each sex cell contains 37 chromosomes.
To learn more about chromosomes refer:https://brainly.com/question/11912112
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