101 such as C) X chr D) Males are hemizygous for the X chromosome. 12)A recessiv

Question

101 such as C) X chr D) Males are hemizygous for the X chromosome. 12)A recessive allele on the X What is theh normal vision whose father is color blind marries a color-blind male probability that this couple's first son will be color blind? A) 1/4 B) 1/2 C) 2/3 D) 4 13) Which of the following is an example of monosomy in humans? A) Turner syndrome C) Down syndrome D) trisomy X 14) Inheritance patterns cannot always be explained by Menders models of inheritance. If a pair of homologous chromosomes fails to separate during meiosis 1, select the choice that shows the chromosome number of the four resulting gametes with respect to the normal haploid number (n)? A) n +1; n+1; n 1;n-1 B)n+1; n-1; n; n C) n + 1; n 1; n-1;n-1 15) Which of the following solutions would require the addition of the greatest amount of base to bring the solution to neutral pH? A) vinegar at pH 3 B) black coffee at pH 5 C) household bleach at pH 12 D seawater at pH 8 E) gastric juice at pH 2

Explanation / Answer

Answer:

11). D. Males are hemizygous for the X chromosome

Explanation: Males have only one X chromosome. So that one affected allele is enough to apper disease in males, whereas in females two affected alleles must be present to appear the trait as females have two X chromosomes.

12). A. ¼

Explanation:

XC=Normal ; Xc = Color blindness

Woman (XCXc) x Man (XcY)---Parents

Xc

Y

XC

XCXc (normal female)

XCY (normal male)

Xc

XcXc (color blind female)

XcY (color blind male)

The probability of color blind male = ¼

13). A). Turner syndrome

Explanation:

Turner syndrome (TS), also known as 45, X or 45, X0, is a condition in which a female is partly or completely missing an X chromosome.

14). A). n+1; n+1; n-1; n-1

Explanation:

Meiosis 1 = One gamete has 24 (n+1) chromosomes and another gamete has 22(n-1) chromosomes.

Meiosis II = Two gametes havw 24 (n+1) chromosomes each and another two gametes have 22(n-1) chromosomes each.

15). E. Gastric juice at pH 2

Xc

Y

XC

XCXc (normal female)

XCY (normal male)

Xc

XcXc (color blind female)

XcY (color blind male)

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.