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Chapter 4: Patterns Of Heredity

Test Description: Review for Chapter 4 test

Instructions: Answer all questions to get your test result.

1) Inherited traits are the result of

Athe devision of 2n cells Bgenes Cpractice and ability Dmeiosis I

2) What happens during sexual reproduction?

AA body cell from each parent combines to form a new cell. BA gamete from each parent combines to form a new cell. CRecessive genes combine to form an offspring. DDominant genes combine to form an offspring.

3) An allele that is expressed even if only one copy is present in a genotype is a

Ahalf allele Brecessive allele Ccomplete allele Ddominant allele

4) Dwarf pea plants (tt) are crossed with pea plants of regular height (TT). Which of these describes the first generation plants?

AAll are regular height. BOne-quarter are dwarf height. CHalf are regular height. DAll are dwarf height.

5) A Punnett square is a representation of how

Agenes are arranged on chromosomes Bmeiosis will occur Chomologs might split Dalleles might combine

6) A parent has one dominant allele for tall (T) and one for short (t). The other parent has a tt genotype. What is the probability of the offspring's being tall?

A25 percent B50 percent C100 percent D0 percent

7) What are the chances that a human offspring will have an XY genotype?

A3:4 B1:1 C1:2 D1:4

8) A 2n human cell has 46 chromosomes. How many chromosomes does a male gamete have?

A45 B23 C92 D46

9) During meiosis, cells divide

Aeight times Btwice Conce Dfour times

10) Which of the following occurs in meiosis that does NOT occur in mitosis?

ABody cells are made. BSex cells are made. CFertilization occurs. DCell division occurs.

*select an answer for all questions

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