Download App

STD 12 - 4. principal of inheritance and variation — Biology STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceBiologySTD 12 - 4. principal of inheritance and variation1 Mark
MCQ
Genotype of a Down's syndrome is
  • ✓
    $45 + XX$
  • B
    $44 + XY$
  • C
    $44 + XXY$
  • D
    $22 + XY$
✓

Answer

Correct option: A.
$45 + XX$
a
It's Obvious

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from STD 12 - 4. principal of inheritance and variation→STD 12 - 4. principal of inheritance and variation — all question types→Biology STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

To grow microbes on a commercial scale, a large vessel is required, which is known as:
→
In sickle cell anaemia glutamic acid is replaced by valine. Which one of the following triplets codes for valine?
→
In which type of flowers, stigma is rough and sticky
→
Semiconservative model of $DNA$ replication was proposed by which workers in eukaryotes
→
Ideal contraceptive should be

$I$. User-friendly

$II$. Easily available

$III$. Effective

$IV$. Interferring coitus

$V$. Expensive and effective

→
Secondary productivity is
→
Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because:
→
Evolution of different species in a given area starting from a point and spreading to other geographical area is known as:
→
India has only ....... percent of the word's land area, its share of the global species diversity is .......... percent.
→
Golden rice is a genetically modified crop plant where the incorporated gene is meant for biosynthesis of:
→