HSA Review Lessons 15-18: Question Preview (ID: 1878)

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In pea plants, yellow seeds (Y) are dominant over green seeds (y). A scientist is studying two plants with yellow seeds. Which information must be true about the plants?
a) The plants have the same genotype.
b) The plants have different genotypes.
c) The plants have the same phenotype.
d) The plants have different phenotypes.

In rabbits, the allele for black coat color (B) is dominant over the allele for brown coat color (b). Two black rabbits (Bb) are mated. What can you predict about the offspring?
a) Most of the offspring will be brown.
b) Most of the offspring will be black.
c) All of the offspring will be brown.
d) All of the offspring will be black.

A Labrador retriever can be black, yellow, or brown. Which of these processes makes it possible for two Labs to produce offspring of different colors?
a) meiosis
b) mitosis
c) osmosis
d) binary fission

A sperm cell of a moth has 112 chromosomes. How many chromosomes are in the moth's wing cells?
a) 66
b) 112
c) 224
d) 448

After an egg cell containing 16 chromosomes is fertilized, how many chromosomes will be present in the zygote?
a) 8
b) 16
c) 32
d) 64

Which of these combinations results in the expression of a recessive trait?
a) two dominant alleles
b) a dominant sex-linked allele and a Y chromosome
c) two recessive alleles
d) a dominant allele and a recessive allele

The physical characteristics of an organism are its
a) genetics
b) heredity
c) phenotype
d) genotype

A Punnett square is used to determine the
a) probable outcome of a cross
b) actual outcome of a cross
c) result of mitosis
d) result of meiosis

To maintain the chromosome number of an organism, the gametes must
a) become diploid
b) become recessive
c) be produced by mitosis
d) be produced by meiosis

Different forms of a gene are called
a) hybrids
b) dominant factors
c) alleles
d) recessive factors

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