Examlex
Discuss why teachers are often the first to notice the signs of vision impairment in young children.
Allele
One of two or more versions of a gene that determine variations in a hereditary characteristic.
Gamete
A mature haploid male or female germ cell which is able to unite with another of the opposite sex in sexual reproduction to form a zygote.
Chromosomes
Protein-based, threadlike formations present in the nuclei of plant and animal cells, consisting of a single DNA (deoxyribonucleic acid) molecule.
Dizygotic Twins
Also known as fraternal twins, these are siblings born at the same time as a result of two separate eggs being fertilized by two separate sperm.
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