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Sex ratio

Definition

noun

The proportion of males to females in a species or in a population.


Supplement

Primary sex ratio refers to the ratio at conception. Secondary sex ratio refers to the ratio at birth. Tertiary sex ratio refers to the ratio at maturity.


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Mendel's Law

Having issues with determining the ratio. Describe the phenotypic and genotypic ratios for the F2 generation if pea plants with restricted yellow pods are crossed with true-breeding inflated green pods in the original cross and then the F1 ...

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by curlzz07
Sat Oct 04, 2014 2:28 pm
 
Forum: Genetics
Topic: Mendel's Law
Replies: 1
Views: 85

Re: Any ideas for vaccine development or anti-viral drugs???

... and AVI-7539) or AVI-6003 (a combination of AVI-7287 and AVI-7288) were administered as sequential intravenous (IV) infusions of a 1:1 fixed dose ratio of the two subcomponents. In each study, 30 healthy male and female subjects between 18 and 50 years of age were enrolled in 6 dose escalation ...

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by jonmoulton
Mon Sep 15, 2014 3:04 pm
 
Forum: Cell Biology
Topic: Any ideas for vaccine development or anti-viral drugs???
Replies: 2
Views: 581

Re: Re:

... effect of any genetic differences. The image depicts roughly what I am saying. As the variation associated with environment increases, the odds ratio approaches 1:1, a 50/50 split of probability regarding which group is overall genetically superior in terms of the predisposition toward intelligence. ...

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by wildfunguy
Thu Mar 13, 2014 4:13 am
 
Forum: Human Biology
Topic: Brain size=IQ level theory (Blacks vs Whites & Asians)
Replies: 72
Views: 270620

Rabbit colors

... males, the other two are females. Now great things happen: a. One black rabbit and one brown rabbit produce black and brown offsprings in a 1:1 ratio b. One black rabbit and one white rabbit produce brown offsprings c. One brown rabbit and another brown rabbit produce black, brown and white ...

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by kau
Sun Mar 09, 2014 1:37 pm
 
Forum: Genetics
Topic: Rabbit colors
Replies: 1
Views: 928

I Need Help understanding gametes, genotypes and phenotypes

I am having trouble understanding how to figure out the ratio of genotypes and phenotypes. The question says: There is an allele E which codes for unattached earlobes in humans. The allele e codes for the attached earlobes which do not hang free. If ...

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by Jojo789
Tue Oct 29, 2013 3:02 am
 
Forum: Genetics
Topic: I Need Help understanding gametes, genotypes and phenotypes
Replies: 5
Views: 4276
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