Chromosomes are inherited from the parents. One chromosome from each of 23 pairs came from each of the parents. The two chromosomes of a pair (except for the sex chromosomes) contain the same genes, but the genes have small differences. The X and Y Chromosomes determine the organism’s sex. One chromosome pair - the sex chromosomes - is unique. Typically females have two X chromosomes and males have an X and a Y. Mothers always pass an X chromosome on to their children. Whether the father passes on his X chromosome (leading to a pair of X chromosomes) or his Y chromosome (making a mixed set) determines your sex. Chromosomes get shuffled when eggs and sperm are made. Though most adult cells contain two sets of chromosomes, sperm and egg cells are different. These special cells have just one chromosome from each pair. Which chromosome they get from each pair is random, making each sperm or egg cell unique. There is also a bit of mixing before the chromosomes are sorted into individual sperm or egg cells. Chromosomes from each pair in a mother or father, respectively, make contact and exchange pieces of DNA, creating hybrid chromosomes.
Answer:
Explanation:
genes and DNA code for the production of proteins, which can cause traits to be expressed .
President Richard Nixon established the U.S. environmental protection agency.
The Environmental Protection Agency is an independentexecutive agency of the United States federal government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it began operation on December 2, 1970, after Nixon signed an executive order.
The Environmental Protection Agency protects people and the environment from significant health risks, sponsors and conducts research, and develops and enforces environmental regulations.
The Environmental Protection Agency (EPA) is a federal government agency, created by the Nixon Administration, to protect human health and the environment. The EPA creates and enforces environmental laws, inspects the environment, and provides technical support to minimize threats and support recovery planning.
Learn more about U.S. environmental protection agency:
#SPJ5
Answer:
richard nixon
Explanation:
hope it helps
Answer:
Explanation:
To determine the type of microscope used to capture the image of a cell's mitochondrion, you would typically need additional information, such as the features of the microscope and the microscopy technique employed. Microscopes commonly used to visualize cell structures include optical microscopes, electron microscopes, and fluorescence microscopes, each with its own capabilities and applications. If you have more details about the image or the microscope used, I'd be happy to provide further assistance.
An action potential in a muscle cell is initiated by acetylcholine, which binds to receptors on the muscle cell membrane, causing depolarization. This triggers voltage-gated sodium channels to open, allowing sodium influx into the cell, which propagates the action potential. The action potential then leads to muscle contraction.
An action potential on a muscle cell is initiated through a complex sequence of events. First, a neurotransmitter called acetylcholine (ACh) is released from the motor neuron and binds to receptors on the muscle cell membrane or sarcolemma. This binding opens up a channel in the ACh receptor, allowing positively charged sodium ions to enter the muscle fiber.
This ion movement causes the muscle fiber to depolarize, or become less negative, changing the membrane potential. As the membrane depolarizes, another set of ion channels, the voltage-gated sodium channels, are activated and trigger an influx of more sodium ions into the muscle fiber.
This flooding of sodium ions propagates an action potential, or electrical signal, across the entire muscle cell membrane. This action potential then interacts with the sarcoplasmic reticulum to release calcium ions, leading to muscle contraction.
#SPJ11
Crop rotation does all the things listed in the options exceptoption d. organic fertilizer.
Crop rotation is a farming practice that involves the systematic planting of different crops in a specific order over time. It offers several benefits to agricultural systems, including minimizing erosion, letting fields lie fallow (rest) to restore soil health, and returning nutrients to the soil. However, crop rotation itself does not involve the use of organic fertilizer. Instead, it focuses on the strategic arrangement of crops to enhance soil fertility and reduce pest and disease buildup.
Therefore, the correct answer is d) organic fertilizer.
Learn more about crop rotation here:
#SPJ 6
Answer:
DNA is responsible for traits.
A section of DNA that codes for a specific trait is called a gene.
Half of your DNA comes from each parent.
Your traits are a combination of your parents’ traits.
DNA is the blueprint for proteins, which play many roles in the body.
Explanation:
Information to include in your answer on edge 2020