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Jet001 [13]
1 year ago
8

The somatic cell of a rat contains 42 chromosomes (2=42). How many chromosomes and how many dna molecules would the secondary sp

ermatocyte of this rat have?
Biology
1 answer:
Dafna11 [192]1 year ago
5 0

There are the same number of chromosomes and DNA molecules in this rat's main spermatocyte cell as in its somatic cell (42 chromosomes). This is due to the fact that primary spermatocytes are still diploid because they have not experienced meiosis to form secondary spermatocytes (2n).

<h3>What is meiosis?</h3>

In sexually reproducing organisms, meiosis is a unique type of cell division of germ cells that results in the production of gametes, such as sperm or egg cells. It comprises two rounds of division, producing four cells with only one copy of each chromosome as a final product (haploid).

Additionally, each chromosome undergoes genetic material cross-pollination between the paternal and maternal copies before division, resulting in novel combinations of the genetic code on each chromosome. Later, when a male and a female go through meiosis, the haploid cells they generate unite to form the zygote, another cell with two copies of each chromosome.

To learn more about meiosis with the help of given link:

brainly.com/question/25995456

#SPJ4

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6 0
3 years ago
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1) Students in a science class created Eco columns to mimic a small ecosystem. Grass seeds were planted in 50 grams of potting s
bazaltina [42]

B) The grass height was the dependent variable.

E) Intermediate numbers of insects had the greatest positive impact on grass growth.

<h3>How insects affect the plant growth?</h3>

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Which statement regarding the hypothalamus is FALSE?
Margarita [4]

Answer:

All the options are correct regarding hypothalamus.

Explanation:

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This is the thermoregulatory center of the body. It gives the signal to sweat during a hot environment and shiver in winter. This maintains the water balance in the body by stimulating the secretion of ADH hormone in the kidney.

Hypothalamus also has regulated anterior pituitary hormone secretion. Thus it controls the endocrine secretion of pituitary glands.

This plays an important role in hunger and thirst. The feeding habits like the licking of lips, swallowing, and salivating by seeing delicious foods is due to hypothalamic activities.

The behavioral activities of individuals influenced by the hypothalamus.  It is worked along with the limbic system of the brain. The behavioral activities include fear, punishment and sexual desire.

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3 years ago
Which brain-scanning technique below is correctly matched with its description?
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Definition or examples of the words
sladkih [1.3K]

answer;  Genetic variation is a term used to describe the variation in the DNA sequence in each of our genomes. ... Individuals of a species have similar characteristics but they are rarely identical, the difference between them is called variation. Updated January 06, 2020. A gene is a portion of DNA that determines a trait. A trait is a characteristic, or a feature, passed from one generation to another, like height or eye color. Genes come in multiple forms or versions. Each of these forms is called an allele

Explanation:

Term

Meaning

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The process by which modern organisms have descended from ancient organisms over time

Common ancestor

An ancestor shared by two or more descendant species

Natural selection

Evolutionary mechanism in which individuals that are better suited to their environment survive and reproduce most successfully

Variation

Difference between traits in individuals of the same species

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A mechanism of evolution in which allele frequencies of a population change over generations due to chanc

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