Why don't u ask your teacher
A DNA molecule consists of two strands of nucleotides twisted together to form a double helix. The sugar-phosphate backbone is found on the outside of this helix and the bases are found braching towards the middle. Hydrogen bonds join the thenitrogenous bases and hold the two strands together.
Therefore your answer is sugar and phosphate.
The first statement above is an example of incomplete dominance. If
the calf has black and white spots then that’s an example of codominance.
Incomplete dominance is a form of transitional
inheritance in which one allele for an explicit trait is not entirely expressed
over its paired allele. This effects in a third phenotype in which the
expressed physical trait is a mixture of the phenotypes of both alleles.
Codominance<span> is a form of dominance by which the alleles of a gene
pair in a heterozygote are wholly expressed. This effects in offspring with a
phenotype that is neither dominant or recessive. A usual example showing this type of dominance is
the ABO blood group system.</span>
<span> </span>
• Skeletal and limb abnormalities
• Central nervous system alterations
• Heart defects
These are applicable in examples to many drugs that reach the developing fetus or embryo can cause death or congenital defects.
<h3>What is meant by congenital defects?</h3>
- A congenital anomaly is a morphological or functional abnormality that appears during intrauterine life.
- These illnesses, which are also known as birth defects, congenital disorders, or congenital abnormalities, arise during pregnancy and can be detected before or at birth as well as later in life.
<h3>What kinds of flaws are instances of congenital?</h3>
- Cleft lip and palate are typically discovered during standard prenatal screenings.
- congenital heart disease, which might include a hole in the heart, a valve issue, or a blood vessel issue.
- Usually identified in the first few years of life, cerebral palsy.
<h3>Each of the medications or drug classes listed below has the potential to give birth to abnormalities in an unborn child:</h3>
- ACE inhibitors (angiotensin converting enzyme).
- antagonist of angiotensin II.
- alcohol
- cocaine
- isotretinoin (an acne medication) (an acne drug)
- high vitamin A dosages.
To learn more about congenital defects visit:
brainly.com/question/5703674
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