ADV 7th Benchmark Review 2-b: Question Preview (ID: 12816)


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The alleles for tall stems in plants are dominant. Crossing a pruebred tall plant with a purebred short plant would result in
a) all tall plants b) all short plants c) all medium height plants d) half short and half tall plants
In a cross between an AA organism and an Aa organism, which statement is true?
a) Both parents are heterozygous for the trait b) Both parents are homozygous for the trait c) The trait is codominant d) One parent is homozygous and one parent is heterozygous
In a cross between two heterozygous organisms, what percentage of the offspring are likely to be homozygous?
a) 0% b) 25% c) 50% d) 75%
In a cross between two heterozygous organisms, what fraction of the offspring will show the dominant trait?
a) 1/4 b) 2/4 c) 3/4 d) 4/4
Scientists call an organism that has two different alleles for a trait
a) a hybrid b) homozygous c) probability d) homologous
Traits are controlled by
a) purebreds b) analogies c) homologies d) genes
____________ are the different forms of a gene
a) chromosomes b) alleles c) phenotypes d) genotypes
Traits are passed on from parents to offspring in a process called _____
a) mitosis b) mutation c) genetics d) heredity
In a genetic cross, the allele that each parent will pass on to its offspring is based on _____.
a) probability b) punnet squares c) fertilization d) transfer RNA
____________ are carried from parents to offspring on chromosomes.
a) Genes b) Phenotypes c) Hybrids d) Purebreds
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