In biology, a gene (from genos (Greek) meaning generation or birth or gender) is a basic unit of heredity and a sequence of nucleotides in DNA or RNA that encodes the synthesis of a gene product, either RNA or protein.
What is the correct term for a segment of DNA that encodes the formula for a particular protein molecule?
A gene is a region of DNA that encodes function. A chromosome consists of a long strand of DNA containing many genes. A human chromosome can have up to 500 million base pairs of DNA with thousands of genes.
Which of the following is the correct term for a segment of DNA?
The order of these bases is called the DNA sequence. Segments of DNA that carry genetic information are called genes , and they are inherited by offspring from their parents during reproduction.
Which of the following is a valid criticism of Piaget's theory?
One of the most popular criticisms of Piaget's theory is the argument that he greatly underestimated the capabilities of children within certain stages of his theory (e.g. sensori-motor, pre-operational).
What is the period of the greatest vulnerability to teratogens for all organ systems?
The embryonic period , during which organogenesis takes place, occurs between implantation at around 14 days to around 60 days postconception. This is usually the most sensitive period to teratogenesis when exposure to a teratogenic agent has the greatest likelihood of producing a malformation.
What are the 4 types of genes?
The chemicals come in four types A, C, T and G . A gene is a section of DNA made up of a sequence of As, Cs, Ts and Gs. Your genes are so tiny you have around 20,000 of them inside every cell in your body! Human genes vary in size from a few hundred bases to over a million bases.
What is gene example?
For example, if both of your parents have green eyes, you might inherit the trait for green eyes from them. Or if your mom has freckles, you might have freckles too because you inherited the trait for freckles. Genes aren't just found in humans — all animals and plants have genes, too.
What are the four base pairs in DNA?
There are four nucleotides, or bases, in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T) . These bases form specific pairs (A with T, and G with C).
What are DNA segments?
A shared DNA segment is a chunk of genetic material shared between two individuals . ... The “shared segments” are how many blocks that matching DNA is broken into. Segments: chunks of DNA. Within our cells, our DNA is packaged into structures called chromosomes.
How many genes are in a chromosome?
Chromosome 1 likely contains 2,000 to 2,100 genes that provide instructions for making proteins.
What is one difference between Piaget's theory and Vygotsky's theory?
The fundamental difference between Piaget and Vygotsky is that Piaget believed in the constructivist approach of children , or in other words, how the child interacts with the environment, whereas Vygotsky stated that learning is taught through socially and culturally.
How has Piaget influenced current practice?
A Piaget influenced curricula , upholds the belief that children need to explore, to experiment, (and something close to my heart), to question. It advocates that children should be provided with opportunities to discuss and debate with each other, with teachers acting as guides and facilitators.
How is Piaget's theory used in the classroom?
In the classroom, teachers can apply Piaget's notions of assimilation and accommodation when introducing new material . ... Teachers can thus put their lessons and student interactions in this context. Later in the stage, educators can integrate more abstract thinking, non-egocentric concepts, and advanced language skills.
What are 4 teratogens?
Teratogens are classified into four types: physical agents, metabolic conditions, infection, and finally, drugs and chemicals . The word teratogen originates from the Greek word for monster, teratos.
Is caffeine a teratogen?
In humans, caffeine does not present any teratogenic risk . The increased risk of the most common congenital malformations entailed by moderate consumption of caffeine is very slight.
What are common teratogens?
A teratogen is a substance that can cause abnormalities or birth defects in a developing fetus. Common teratogens include some medications, recreational drugs, tobacco products, chemicals, alcohol, certain infections , and in some cases, uncontrolled health problems in the birthing parent.
