Monohybrid Cross Quiz

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Genetics: single-gene crosses

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Nour Haidar

Lebanon

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Monohybrid Cross Quiz


Monohybrid Cross QuizVersion en ligne Genetics: single-gene crosses par Nour Haidar 1 In a monohybrid cross, what is being tracked in the offspring? a Chromosome number b Only dominant traits c Multiple traits d A single trait (gene) 2 If Aa is crossed with Aa, what is the phenotypic ratio in a typical complete dominance cross? a 1:2:1 b 4:0 c 2:2 d 3:1 for dominant:recessive 3 What is the genotype ratio for Aa x Aa? a 1 AA : 2 Aa : 1 aa b 1 AA : 1 Aa : 2 aa c 3 AA : 1 Aa d 2 AA : 1 Aa : 1 aa 4 A heterozygous tall plant (Tt) is crossed with a homozygous recessive plant (tt). What fraction of offspring are tall? a 1/2 b 0 c 3/4 d 1/4 5 In a monohybrid cross, what does a Punnett square help predict? a Chromosome disorders b DNA sequences c Mutation rates d Genotype and phenotype ratios 6 If the dominant allele completely masks the recessive allele, what is this called? a Incomplete dominance b Pleiotropy c Codominance d Complete dominance 7 Which term describes the actual genetic makeup of an organism for a trait? a Allele frequency b Karyotype c Genotype d Phenotype 8 What is the phenotype of a plant with genotype Aa in a complete dominance cross? a Both traits expressed b Dominant trait expressed c Recessive trait expressed d No trait expressed 9 A blue flower color is recessive to red in a monohybrid cross. What is the phenotype ratio for cross RR x rr? a 50% red, 50% blue b 75% red, 25% blue c All blue flowers d All red flowers 10 Which cross would produce a 1:2:1 genotype ratio in offspring? a Aa x Aa b AA x aa c AA x Aa d aa x aa Feedback 1 Monohybrid crosses focus on one gene with two alleles. 2 Aa x Aa yields 3 dominant to 1 recessive phenotype in complete dominance. 3 Mendelian 1:2:1 genotype ratio. 4 Tt x tt yields 50% T_ (tall) and 50% tt (short). 5 Punnett squares visualize potential genotypes and phenotypes. 6 In complete dominance, dominant phenotype appears in heterozygotes. 7 Genotype is the allele combination (e.g., AA, Aa, aa). 8 In complete dominance, the dominant allele masks the recessive. 9 RR x rr yields all homozygous dominant red flowers. 10 Aa x Aa is the classic dihybrid-like single-gene cross producing 1:2:1.

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Monohybrid Cross Quiz

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À propos de cette activité

Créé par

Téléchargez la version pour jouer sur papier

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Monohybrid Cross QuizVersion en ligne

par Nour Haidar

In a monohybrid cross, what is being tracked in the offspring?

If Aa is crossed with Aa, what is the phenotypic ratio in a typical complete dominance cross?

What is the genotype ratio for Aa x Aa?

A heterozygous tall plant (Tt) is crossed with a homozygous recessive plant (tt). What fraction of offspring are tall?

In a monohybrid cross, what does a Punnett square help predict?

If the dominant allele completely masks the recessive allele, what is this called?

Which term describes the actual genetic makeup of an organism for a trait?

What is the phenotype of a plant with genotype Aa in a complete dominance cross?

A blue flower color is recessive to red in a monohybrid cross. What is the phenotype ratio for cross RR x rr?

Which cross would produce a 1:2:1 genotype ratio in offspring?

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