Unit 4 Genetics Study Guide Quizizz

Which describes a trait from a recessive gene?

• It causes a mutation.

• It masks a dominant gene trait

• It can appear if it is heterozygous

• It only appears if it is homozygous

What can be assumed about the parent cell if, after asexual reproduction, the daughter cell has 24 chromosomes?

• The parent cell has 12 chromosomes.

• The parent cell has 24 chromosomes.

• The parent cell has 48 chromosomes.

• The parent cell has 76 chromosomes.

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Which statement describes the offspring expected from this cross? Bb X Bb (Blue is dominant to white) DO A PUNNETT SQUARE!

• 50% white-flowered and 50% blue-flowered

• 75% white-flowered and 25% blue-flowered

• 75% blue-flowered and 25% white-flowered

• 100% blue-flowered and 0% white-flowered

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How many heterozygous alleles are there in these homologous chromosomes?

• 2

• 3

• 4

• 5

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In sexual reproduction, offspring are genetically different from the parents. This is because

• reproduction occurs very rapidly.

• only one parent is involved in reproduction.

• combined genes are received from both parents.

• there is less variations in daughter organisms.

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Humans use ________ to pass on desired phenotypic traits to the next generation of organisms.

• natural breeding

• selective breeding

• selective insemination

• artificial fertilization

What is involved in the process of artificial selection?

• An organism with a beneficial trait is more likely to survive.

• An animals' genes undergo a mutation that produces a certain trait.

• Animals mate randomly, and a beneficial trait emerges in the offspring.

• Humans select animals to breed that create offspring with desired traits.

A homozygous brown mouse mates with a heterozygous brown mouse. The allele for brown fur (B) is dominant over the allele for tan fur (b). What percentage of the offspring will most likely have brown fur? PUNNETT SQUARE

• 25%

• 50%

• 75%

• 100%

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Which statement best describes the influence that parents have on whether or not offspring inherit a genetically inherited trait?

• Each parent contributes one allele.

• Each parent contributes two chromosomes.

• Each parent contributes one chromosome.

• Each parent contributes two alleles.

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Which statement describes asexual reproduction, but not sexual reproduction?

• New organisms are formed only after fertiliztion.

• A single cell will not develop into a full organism.

• Daughter cells contain half the genetic material of the parent cell.

• Daughter cells contain the same genetic information as parent cells.

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