02_8TH GRADE - SCIENCE 4Q [MENDELIAN GENETICS]

An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus,

• G
• GG
• GH
• HHH

Homozygous dominant allele is represented by the letters ____________.

• RR
• Sr
• Rr
• rr

Who pioneered on the study of Genetics?

• Carolus Linnaeus
• Charles Darwin
• Gregor Mendel
• Robert Brown

A pair of dissimilar alleles for a certain trait is called _____________.

• Allele
• Chromosome
• Heterozygous genes
• Homozygous genes

It is the study of genes to determine traits inherited by the offspring from the parents?

• Botany
• Genetics
• Histology
• Zoology

Which genotype of an organism is with the same alleles for a trait?

• Genes
• Heterozygous genotype
• Homozygous genotype
• Polygenes

Which pair of alleles are not identical?

• Allele
• Chromosome
• Heterozygous
• Homozygous

The genetic makeup of an organism is called ____________.

• Genotype
• Heredity
• Offsprings
• Phenotype

Which of the following is a heterozygous dominant genotype?

• HH

• Hh

• HHH

• hh

A monohybrid cross is a cross using _________.

• two factors or characters
• a single trait or character
• several factors or characters
• a combination of characters