Biology Genetics Revision Quiz (Form 4)

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Genetics revision quiz

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Jonathan Nthiwa

Kenya

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Biology Genetics Revision Quiz (Form 4)


Froggy Jumps Biology Genetics Revision Quiz (Form 4)Online version Genetics revision quiz by Jonathan Nthiwa 1 Which term describes a trait that masks another in a heterozygote? a Recessive b Dominant c Co-dominant 2 Which term describes a trait that masks another in a heterozygote? a Recessive b Dominant c Co-dominant 3 In a monohybrid cross Aa x Aa, the genotype ratio is: a 1 AA : 1 Aa b 3 AA : 1 Aa c 1 AA : 2 Aa : 1 aa 4 Sex determination in humans is most commonly by which system? a XY system; father determines the sex b Manifestation in the environment c ZW system; mother determines the sex 5 Punnett squares primarily predict what about offspring? a Probability of inherited traits b Age at which traits appear c Exact phenotypes 6 Which mutation type introduces a new allele in the gamete lineage? a Acquired mutation after birth b Germline (gametic) mutation c Somatic mutation 7 Define genotype. a Study of heredity in populations b Genetic makeup/allele combination of an individual c Physical appearance only 8 Define phenotype. a Chromosome number only b Observable traits resulting from genotype and environment c Allele combination only 9 What is a monohybrid cross? a Cross testing many genes at once b Cross involving multiple species c Cross examining only one gene trait 10 Differentiate homozygous from heterozygous. a Homozygous has identical alleles; heterozygous has different alleles b Homozygous is dominant; heterozygous is recessive c Homozygous is diploid; heterozygous is haploid 11 Explain Punnett square use in genetics. a To determine mutation rates b To measure cross-breeding efficiency c To predict genotype and phenotype probabilities in offspring 12 Explain dominance and recessiveness with an example. a Dominant traits are always harmful; recessive always beneficial b Dominant trait appears in phenotype even if only one dominant allele is present; recessive only if t c Dominant traits skip generations; recessive traits appear every generation 13 Describe sex-linked inheritance using a simple Punnett example. a Sex-linked traits are inherited from father only b X-linked genes show different male/female phenotypes; e.g., color blindness with X^B X^b crosses c Autosomal traits only 14 What is the difference between genotype and phenotype? a Genotype: allele combo; phenotype: outward trait b Genotype and phenotype refer to the same thing c Genotype: phenotype; phenotype: genotype 15 Discuss variation and mutation in evolution. a Mutations create new alleles leading to variation; natural selection acts on this variation b Mutations erase all variation in populations c Variation only arises from environment; mutations not involved 16 Monohybrid cross example with PP x pp yields what phenotype ratio? a 50% tall, 50% short b 100% tall if P is dominant; 100% tall; but if P not specified: need context c All short

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Biology Genetics Revision Quiz (Form 4)

Froggy Jumps

About this activity

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Biology Genetics Revision Quiz (Form 4)Online version

by Jonathan Nthiwa

Which term describes a trait that masks another in a heterozygote?

Which term describes a trait that masks another in a heterozygote?

In a monohybrid cross Aa x Aa, the genotype ratio is:

Sex determination in humans is most commonly by which system?

Punnett squares primarily predict what about offspring?

Which mutation type introduces a new allele in the gamete lineage?

Define genotype.

Define phenotype.

What is a monohybrid cross?

Differentiate homozygous from heterozygous.

Explain Punnett square use in genetics.

Explain dominance and recessiveness with an example.

Describe sex-linked inheritance using a simple Punnett example.

What is the difference between genotype and phenotype?

Discuss variation and mutation in evolution.

Monohybrid cross example with PP x pp yields what phenotype ratio?