BIO study guide
A male and female have 3 offspring all of which are female. The couple is now pregnant again.What is the likelihood that the next child will be a female?
1/2
The typical human body cell contains 46 chromosomes. How many chromosomes are found in a typical human sperm?
23 chromosomes
A human liver cell would have how many pairs of chromosomes present?
46
A triploid cell contains three sets of chromosomes. If a cell of a usually diploid species with 42 were to mutate and be triploid what would be true about their chromosomes?
63 chromosomes in 21 sets of 3
Chromosomal mutations occur________________ meiosis
During
Which of the following is a true statement about sexual vs. asexual reproduction?
In sexual reproduction, individuals transmit 50% of their genes to each of their offspring
Which is true about the Y chromosome when compared to the X chromosome?
It is smaller than the X
A given organism has 46 chromosomes in its karyotype. We can therefore conclude which of the following?
Its gametes must have 23 chromosomes
How do cells at the completion of meiosis compare with cells that have replicated their DNA and are just about to begin meiosis?
They have half the number of chromosomes and half the amount of DNA
Genes are found on which parts of a cell?
chromosomes
Genetics is the study of ____
how traits are passed to offspring
A human sperm cell would have how many chromosomes present?
twenty- three chromosomes
Crossing over would most likely occur during which stage of the cell cycle?
when homologous chromosomes line up in pairs
