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3 years ago

What does it mean when we say a trait is dominant?

Biology

2 answers:

Aliun [14]3 years ago

7 0

Answer choice C is correct

krok68 [10]3 years ago

5 0

Answer:

C.Offspring show this trait even if only one parent contributes the allele.

Explanation:

Dominant trait is the one that is expressed in both heterozygous and homozygous genotypes. The heterozygous genotype carry one dominant and one recessive allele for a trait but exhibit the dominant phenotype only.

Example: A cross between pure breeding tall (TT) and pure breeding dwarf (tt) plant gives all tall (Tt) progeny. Here, the tall progeny has received one "T" from tall parent and one "t" allele from the dwarf parent.

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In an analysis of the nucleotide composition of a molecule of DNA, which of the following combinations of base pairs will be fou

Naily [24]

Answer: The correct answer is A) A+C=G+T

According to Watson and Crick base pairing-

In a double stranded DNA molecule, Adenine pairs with Thymine and Guanine pairs with Cytosine. This means that number of Adenine in one strand is equal to the number of thymine in the complementary DNA strand. Similarly, the number of Cytosine in one strand is equal to the number of Guanine in the complementary strand.

Thus, the total number of Adenine and Cytosine in one strand becomes equal to the total number of Guanine and Thymine in the complementary strand.

This can be mathematically written as- A+C = G+T

Thus, option A) is the right answer.

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3 years ago

Read 2 more answers

What is membrane biogenesis?Answer in detail

saw5 [17]

Membrane biogenesis is the process which involves the synthesis of cell membrane with the help of proteins and lipids.

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3 years ago

Is any trace of an ancient organism preserved in rock. Wegener s theory that the

lesya [120]

Answer:

yes

Explanation:

i had it

3 0

3 years ago

______ are chromosome sequences in which multiple genes contribute to a quantitative trait.

bagirrra123 [75]

Answer:

QTL or Quantitative Trait locus

Explanation:

QTL or Quantitative Trait locus are chromosome sequences in which multiple genes contribute to a quantitative trait.

QLT is a locus that correlates with variation of quantitative trait in the phenotype of the population of an organism. It is an statistical method that links two type of information phenotypic and genotypic data in an attempt to explain the genetic variation in complex trait.

4 0

3 years ago

Normal blood cells slide easily through narrow blood vessels. In sickle cell disease many red blood cells change to a crescent s

natta225 [31]

Answer:

Explanation:

The method of reproduction in humans is sexual reproduction: a type of reproduction that occurs when new organisms are produced through the coming together of genetic information from two individuals of different sexes mostly a male and a female (egg cell and the sperm). The genetic information for making the blood cells; the red blood cells genes in particular exists on chromosomes in the nucleus of the sex cells (egg and sperm cell) also called the gametes. Basically, the DNA provides instructions for the production of mostly all of the body's needs.

The genes coding for the sickle cells which is the abnormal red cell is always inherited in the recessive form meaning both parent has to possess one copy each of the defective gene in their DNA. For humans to get one copy of a sickle cell gene and one copy normal gene; it means one of the parents gametes (be it male or female) contributed the defective chromosome and the other normal gene is contributed by the other parent during copulation giving rise to an individual that is heterozygous for the trait

For example, the sperm cell with the defective gene fertilizes the egg cell that has the normal copy of the gene producing an heterozgous individual.

7 0

3 years ago