The Stages of Childbirth
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Questions and Answers

Which phenomenon refers to the dramatic difference in phenotype when a gene is inherited from the mother or father? (inheritance / imprint)

  • Multiple-allele inheritance
  • Genomic imprinting (correct)
  • Incomplete dominance
  • Polygenic inheritance

Which type of inheritance does not follow the simple dominant-recessive pattern? incomplete doesnt equal simple

  • Incomplete dominance (correct)
  • Genomic imprinting
  • Multiple-allele inheritance
  • Polygenic inheritance

Which type of inheritance involves genes with more than two alternate forms?

  • Multiple-allele inheritance (correct)
  • Genomic imprinting
  • Polygenic inheritance
  • Incomplete dominance

Which type of inheritance involves the combined effects of many genes?

<p>Polygenic inheritance (C)</p> Signup and view all the answers

Which pair of chromosomes are responsible for determining gender (sex)?

<p>The 23rd pair (A)</p> Signup and view all the answers

What is the genetic composition of a female?

<p>XX (B)</p> Signup and view all the answers

What is the genetic composition of a male?

<p>XY (B)</p> Signup and view all the answers

What determines the gender (sex) of an offspring at fertilization?

<p>Presence or absence of an SRY gene (B)</p> Signup and view all the answers

What are traits that are inherited through the sex chromosomes called?

<p>Sex-linked or X-linked traits (A)</p> Signup and view all the answers

Where are genes for sex-linked traits located?

<p>On the X chromosomes (B)</p> Signup and view all the answers

During childbirth, which stage involves the complete dilation of the cervix?

<p>Dilation of the cervix (B)</p> Signup and view all the answers

What is the placental stage of childbirth?

<p>The time after delivery until the placenta is expelled (D)</p> Signup and view all the answers

What is genetics?

<p>The passage of hereditary traits from one generation to another (C)</p> Signup and view all the answers

How many pairs of chromosomes do human cells (except gametes) contain?

<p>23 pairs (B)</p> Signup and view all the answers

What are homologues?

<p>The two chromosomes in a pair that contain genes that control the same traits (A)</p> Signup and view all the answers

What is a mutation?

<p>A permanent heritable change in a gene that causes it to have a different effect than it had previously (A)</p> Signup and view all the answers

What is a genotype?

<p>The genetic makeup of an organism (C)</p> Signup and view all the answers

What do dominant genes do?

<p>Control a particular trait and also inhibit the expression of recessive genes (D)</p> Signup and view all the answers

What does it mean to be homozygous for a trait?

<p>To have the same genes on homologous chromosomes (A)</p> Signup and view all the answers

What are the physical traits expressed by an organism called?

<p>Phenotype (B)</p> Signup and view all the answers

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