Which of the following descriptions does not apply to meiosis?

• During the 1st division, the sister chromatids split
• The chromosome # of daughter cells are haploid
• Homologous chromosomes form tetrads prior to the 1st division
• The cytoplasm and all organelles are divided in half

All of the following contribute to genetic recombination or variation in offspring EXCEPT...

• random fertilization
• independent assortment
• crossing over
• gene linkage

If sister chromatids fail to separate during meiosis 2, what will the chromosome # be in gametes?

• n+1; n+1; n+1; n-1
• n+1; n-1; n; n
• n+1; n-1; n-1; n-1
• n+1; n+1; n; n

If a boy has an X-linked trait, where did he inherit it from?

• mother
• father
• both

Which type of error results from the failure of chromosomes to separate during anaphase?

• nondisjunction
• duplication
• inversion
• translocation

Which is a correct description about meiosis?

• Homologous chromosomes separate during anaphase I
• Sister chromatids separate during anaphase I
• Homologous chromosomes separate during metaphase 2
• Sister chromatids separate during metaphase 2

What's the probability that kids will have the disease with a hemophiliac dad and carrier mom?

• 0%
• 25%
• 50%
• 75%

What is the probability that the following parents will produce the indicated offspring?

• 25%
• 50%
• 75%
• 100%

How many alleles (letters) does a child get from each parent for each trait?

• 1
• 2
• 3
• 4

Tags

NGSS.HS-LS3-1

R=round seed
r=wrinkled seed.
Cross a homozygous round with a wrinkled. Which statement predicts the results?

• offspring will be Rr
• offspring will be RR
• round seeds will be recessive to wrinkled
• Wrinkled will be observed in half of offspring

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2