Froggy Jumps Mendelian Genetics ChallengeOnline version Test your Mendelian mastery. by Hafiz Hassan 1 What is the first Mendelian postulate? a Traits are continuous and blend. b Traits are controlled by genes that occur in pairs. c One gene controls all traits. 2 What does homozygous mean? a Two different chromosomes carry the gene b Both alleles for a gene are the same c The gene is not inherited 3 Monohybrid cross typically yields what F2 phenotypic ratio? a 1:1 b 9:3:3:1 c 3:1 4 Dihybrid cross demonstrates what law? a Law of fusion b Law of independent assortment c Law of dominance 5 In X-linked recessive traits, affected fathers pass to whom? a All daughters b All sons c Neither sons nor daughters 6 A carrier female for an X-linked recessive trait has genotype? a XAXa b XaY c XaXa 7 In Aa × Aa, what fraction are homozygous recessive? a 1/4 b 1/2 c 3/4 8 Test cross helps determine an unknown genotype by crossing with what? a Homozygous dominant b Heterozygous dominant c Homozygous recessive individual 9 What is the term for a trait with a dominant allele masking others? a Recessive allele b Linked allele c Dominant allele 10 Which shows independent assortment in a dihybrid cross? a Alleles are always linked b Alleles of two genes segregate independently c Genes fuse into a single trait 11 Gregor Mendel was a... a Monk b Doctor c Mathematician
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