DP Biology (last assessment 2024)

Test builder »

Question 18N.1.SL.TZ0.14

Select a Test
Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.1.SL.TZ0.14
Level SL Paper 1 Time zone TZ0
Command term Determine Question number 14 Adapted from N/A
14.
[Maximum mark: 1]
18N.1.SL.TZ0.14

A human gene has two alleles. One allele, P, is dominant over the recessive allele p. Embryos that are homozygous for the dominant allele die in the uterus. What is the expected ratio of genotypes for the live offspring of a heterozygous man and a heterozygous woman?

A.  1 : 1

B.  2 : 1

C.  3 : 1

D.  4 : 0

 

[1]

Markscheme

B

Syllabus sections