Lesson 7: Sex Linkage Flashcards
1
Q
The phenotype of sex is determined by
A
a pair of chromosomes
2
Q
The percentages of the punnet square of possible offspring for the sex pair is
A
50% male, 50% female
3
Q
What’s the issue with male sex chromosomes?
A
The X and Y chromosomes are not homologous and are different sizes and genes.
4
Q
What are some tragic consequences of the male chromosome?
A
males, since they have 1 X chromosome, any defective gene on that chromosome is expressed in the phenotype, recessive or not, there is no other copy of the gene.
female have 2 copies of the X chromosome and therfore 2 copies of each gene on that chromosome.
5
Q
There are some traits and complications located on the X chromosome that occur overwhelmingly in
A
males.
