Unattached earlobes is a dominant trait, e. a parent who is homozygous for unattached earlobes is crossed with a parent who is homozygous for attached earlobes. what is the genotypic ratio of their offspring?

The correct answer is -

The genotypic ratio of the offsprings of given parents is 100% Ee (Heterotrozygous dominant that exhibit unattached earlobes).

Explanation:

As per the given information in the question, unattached earlobe is a dominant trait over the attached earlobe, which is a recessive trait.

Dominant trait (expressed by capital letter allele like E for unattached earlobes) masks the expression of recessive trait (that is  expressed by small letter allele such as e for attached earlobes).

Genotype of parents is-

EE (homozygous dominant) that will form 'E' and 'E' gametes.

ee (homozygous recessive) that will form 'e' and 'e' gametes.

When these parents are crossed, they will produce-

     EE × ee

=Ee, Ee, Ee, Ee

Thus, all offspring are heterozygous dominant (Ee) that will exhibit unattached earlobe trait due to the presence of dominant allele (E) in them.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds