How did did we analyze the sex ratio co ceptien in humans in

How did did we analyze the sex ratio co ceptien in humans in the late 1940s and in 2015? Check all that apply By examining embryos conceived using in vitro fertilization Using the worldwide census data to assess the proportion of males and females born O By comparing the numbers of x- and Y bearing sperms produced by males Using data from miscarriages and abortions to compare prenatal mortalities for males and females My Answers Part C How do we know that X chromosomal inactivation of either the paternal or maternal homolog is a random event during early development in Check all that apply Based on the observations of mosaic coat patterns inheritance Based on the cytological observations during the blastocyst stage of development Based on the experiments with electrophoresis of glucose 6 phosphate dehydrogenase Based on the test crosses involving females possessing direnen genetic markersinsex chromosomes 10

Solution

Answer to 1st question

sex ratio at conception, (also called primary sex ratio) is the ratio of male to female at conception (before birth). Hence, methods employed to determine sex ratio at conception are:

A) by examining embryos conceived using IVF.

D) using data from miscarriages and abortions.