What usually causes Down syndrome? A. Maternal infection during early pregnancy B. Fertilization ...

Author Question: What usually causes Down syndrome? A. Maternal infection during early pregnancy B. Fertilization ... (Read 49 times)

Arii_bell

Hero Member
Posts: 596

on: Jun 25, 2018

What usually causes Down syndrome?

A. Maternal infection during early pregnancy
B. Fertilization of an ovum containing an abnormal number of chromosomes
C. An interaction of hereditary and environmental factors
D. An abnormal gene transmitted by Mendelian inheritance

Question 2

A __________ is a set of HLA genes on one chromosome.

A. karyotype
B. haplotype
C. plasmid
D. polar body

nmyers

Sr. Member
Posts: 336

Reply #1 on: Jun 25, 2018

Answer to Question 1

B

Answer to Question 2

B

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