If a homozygous dominant parent and a heterozygous parent are crossed, what percentage of the offspring are expected to be homozygous recessive?

The correct answer is-

The percentage of the offspring that are expected to be homozygous recessive (qq) is 0 %.

As per the information given in the question, the genotypes of parent are-

Homozygous dominant ( QQ) and a heterozygous ( Qq).

Gametes produced are-  QQ parent will produce Q and Q gametes while Qq will produce Q ands q allele.

A dominant allele ( represented by capital letter such as Q) always masks the expression of recessive allele ( represented by small letter such as q)

Homozygous genotye has same alleles whereas heterozygous genotype contains different alleles ( one dominant and one recessive such as Qq).

When the parents are crossed, they will produce 50 % QQ and 50% Qq offsrping but no qq offspring will be produced

Refer punett square.

the electromagnetic energy from the sun arrives in the form of visible and invisible light.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.